answers finding limits algebraically

1:12

2:pi

3:8

4:54

5: -1

6:11

7:4/3

8:0

9:2

10:8

11:12

12:0

13: 4/-5

14: skip

15: DNE

16: DNE

17: DNE

18: DNE

19: +inf

20: +inf

21: -inf

22:DNE

23: DNE

24: DNE

25: 1/4

26: 0

27: +/- 4

28: 6

29: -inf

30: +inf

31: 1/2

32: -3/2

33: 0

34: 0

35: +inf

36: +inf

37: 1

38: 1

39: 0