adding and subtracting rational expressions

2:43

30:14

3:09

3:38

6:15

22:22

8:34

5:30

5:50

5:30

3:36

4:46

4:47

4:36

7:26

30:26

30:30

6:58

3:52

5:11

36:30

4:10

6:41

5:52

کوتاه

4:09

3:37

6:01

7:11

4:51

2:35

6:25

4:15

5:21

10:33

7:33

11:16

4:02

4:45