Please answer 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33 I need to learn the concept and all details please write clear on white paper

19. lim x - 3x + 7 X - + 3 20. lim g (x) X-+ T 21. lim cos x sin x X- 1/4 er. 22. lim 2x - 2 x-1 X4 4 23. lim Inx X-+0 uate eter- 24. lim 4 - 8x X -+3 25. lim cscx X-+ 71 / 6 26. lim In(1 + x) X-+0 27. lim x2+ 3x +5 X-+# 5x2 - 2x -3 3x + 1 28. lim X- 7 1-X X - 4x - 12 29. lim X-6 X - 13x + 42 x + 2x 30. lim x -+0 X2 - 2x x + 6x - 16 31. lim x-+2 x2 - 3x -+ 2 x2 - 10x + 16 32. lim X-+ 2 X2 - x - 2 X- - 5x - 14 33. lim X->-2 x2 | 10x | 16