diff --git a/notes/.obsidian/plugins/obsidian-activity-history/data.json b/notes/.obsidian/plugins/obsidian-activity-history/data.json
index 47b76f4..23fe5c3 100644
--- a/notes/.obsidian/plugins/obsidian-activity-history/data.json
+++ b/notes/.obsidian/plugins/obsidian-activity-history/data.json
@@ -12,8 +12,8 @@
   "checkpointList": [
     {
       "path": "/",
-      "date": "2022-01-06",
-      "size": 639961
+      "date": "2022-01-07",
+      "size": 640626
     }
   ],
   "activityHistory": [
@@ -21,268 +21,8 @@
       "path": "/",
       "size": [
         {
-          "date": "2021-09-11",
-          "value": 881
-        },
-        {
-          "date": "2021-09-12",
-          "value": 117
-        },
-        {
-          "date": "2021-09-13",
-          "value": 1256
-        },
-        {
-          "date": "2021-09-14",
-          "value": 2350
-        },
-        {
-          "date": "2021-09-15",
-          "value": 2658
-        },
-        {
-          "date": "2021-09-16",
-          "value": 2379
-        },
-        {
-          "date": "2021-09-17",
-          "value": 2958
-        },
-        {
-          "date": "2021-09-20",
-          "value": 3532
-        },
-        {
-          "date": "2021-09-21",
-          "value": 504
-        },
-        {
-          "date": "2021-09-22",
-          "value": 1326
-        },
-        {
-          "date": "2021-09-23",
-          "value": 1170
-        },
-        {
-          "date": "2021-09-24",
-          "value": 2420
-        },
-        {
-          "date": "2021-09-29",
-          "value": 2117
-        },
-        {
-          "date": "2021-09-30",
-          "value": 3672
-        },
-        {
-          "date": "2021-10-01",
-          "value": 4392
-        },
-        {
-          "date": "2021-10-04",
-          "value": 3088
-        },
-        {
-          "date": "2021-10-05",
-          "value": 0
-        },
-        {
-          "date": "2021-10-06",
-          "value": 0
-        },
-        {
-          "date": "2021-10-10",
-          "value": 4296
-        },
-        {
-          "date": "2021-10-11",
-          "value": 2247
-        },
-        {
-          "date": "2021-10-12",
-          "value": 0
-        },
-        {
-          "date": "2021-10-13",
-          "value": 321
-        },
-        {
-          "date": "2021-10-14",
-          "value": 1265
-        },
-        {
-          "date": "2021-10-15",
-          "value": 2347
-        },
-        {
-          "date": "2021-10-19",
-          "value": 1661
-        },
-        {
-          "date": "2021-10-21",
-          "value": 12918
-        },
-        {
-          "date": "2021-10-22",
-          "value": 12
-        },
-        {
-          "date": "2021-10-23",
-          "value": 0
-        },
-        {
-          "date": "2021-10-24",
-          "value": 0
-        },
-        {
-          "date": "2021-10-25",
-          "value": 140
-        },
-        {
-          "date": "2021-11-01",
-          "value": 16800
-        },
-        {
-          "date": "2021-11-02",
-          "value": 0
-        },
-        {
-          "date": "2021-11-04",
-          "value": 112719
-        },
-        {
-          "date": "2021-11-05",
-          "value": 1875
-        },
-        {
-          "date": "2021-11-06",
-          "value": 0
-        },
-        {
-          "date": "2021-11-07",
-          "value": 1870
-        },
-        {
-          "date": "2021-11-08",
-          "value": 6153
-        },
-        {
-          "date": "2021-11-12",
-          "value": 6702
-        },
-        {
-          "date": "2021-11-15",
-          "value": 322
-        },
-        {
-          "date": "2021-11-16",
-          "value": 0
-        },
-        {
-          "date": "2021-11-18",
-          "value": 1515
-        },
-        {
-          "date": "2021-11-19",
-          "value": 60229
-        },
-        {
-          "date": "2021-11-20",
-          "value": 303
-        },
-        {
-          "date": "2021-11-21",
-          "value": 0
-        },
-        {
-          "date": "2021-11-23",
-          "value": 2470
-        },
-        {
-          "date": "2021-11-24",
-          "value": 3475
-        },
-        {
-          "date": "2021-11-25",
-          "value": 1703
-        },
-        {
-          "date": "2021-11-26",
-          "value": 345395
-        },
-        {
-          "date": "2021-11-29",
-          "value": 0
-        },
-        {
-          "date": "2021-11-30",
-          "value": 472
-        },
-        {
-          "date": "2021-12-01",
-          "value": 0
-        },
-        {
-          "date": "2021-12-02",
-          "value": 1397
-        },
-        {
-          "date": "2021-12-03",
-          "value": 10913
-        },
-        {
-          "date": "2021-12-04",
-          "value": 0
-        },
-        {
-          "date": "2021-12-06",
-          "value": 2982
-        },
-        {
-          "date": "2021-12-07",
-          "value": 385
-        },
-        {
-          "date": "2021-12-08",
-          "value": 966
-        },
-        {
-          "date": "2021-12-09",
-          "value": 2868
-        },
-        {
-          "date": "2021-12-10",
-          "value": 4093
-        },
-        {
-          "date": "2021-12-11",
-          "value": 0
-        },
-        {
-          "date": "2021-12-14",
-          "value": 1406
-        },
-        {
-          "date": "2021-12-15",
-          "value": 3717
-        },
-        {
-          "date": "2021-12-16",
-          "value": 773
-        },
-        {
-          "date": "2021-12-17",
-          "value": 1071
-        },
-        {
-          "date": "2022-01-05",
-          "value": 12358
-        },
-        {
-          "date": "2022-01-06",
-          "value": 87
+          "date": "2022-01-07",
+          "value": 505
         }
       ]
     }
diff --git a/notes/mat/Lomené výrazy.md b/notes/mat/Lomené výrazy.md
new file mode 100644
index 0000000..4c735ca
--- /dev/null
+++ b/notes/mat/Lomené výrazy.md	
@@ -0,0 +1,24 @@
+# Lomené výrazy
+- výraz ve tvaru zlomku
+## Podmínky
+Nelze dělit všemi čísly => u lomených výrazů musíme stanovit podmínky, aby jmenovatel nebyl roven nule.
+
+$$
+\frac{\frac{3x}{x+1}}{\frac{2x+1}{x-3}}
+$$
+$$
+x \neq -1; x \neq 3; x \neq - \frac{1}{2}
+$$
+## Krácení a rozšiřování lomených výrazů
+Lze krátit jen násobení a dělení, ne sčítání a odčítání.
+
+Pro libovolné výrazy $v_1$, $v_2$, $v_3$
+$$
+\frac{v_1 * v_3}{v_2 * v_3} = \frac{v_1}{v_2}
+$$
+$$
+\xRightarrow{krácení}
+$$
+$$
+\xLeftarrow{rozšiřování}
+$$
diff --git a/notes/mat/Mnohočlen.md b/notes/mat/Mnohočlen.md
index 51621c3..bd6f0e6 100644
--- a/notes/mat/Mnohočlen.md
+++ b/notes/mat/Mnohočlen.md
@@ -1,5 +1,5 @@
 # Mnohočlen
-
+Pouze přirozená čísla v exponentech.
 $$
 (x^3 - 2x + 3) * (x^4 - 3x^2 + 5x) = x^7 - 3x^5 + 5x^4 - 2x^5 + 6x^3 - 10x^2 + 3x^4 - 9x^2 + 15x = x^7 - 5x^5 + 8x^4 + 6x^3 + 19x^2 + 15x
 $$
diff --git a/notes/mat/mat.md b/notes/mat/mat.md
index c4dfd2e..676f4e5 100644
--- a/notes/mat/mat.md
+++ b/notes/mat/mat.md
@@ -11,6 +11,7 @@ imagePrefix: 'data/'
 -  [[mat/Číselné soustavy|Číselné soustavy]]
 -  [[mat/Druhá odmocnina|Druhá odmocnina]]
 -  [[mat/Intervaly|Intervaly]]
+-  [[mat/Lomené výrazy|Lomené výrazy]]
 -  [[mat/Matematika|Matematika]]
 -  [[mat/Mnohočlen|Mnohočlen]]
 -  [[mat/Množiny|Množiny]]