I have three problems that I can't completely figure. I appreciate any help and explanations!

** 17 - 6 **

**x ^{2}-12x+35 x-7**

** x+7 + x +5 **

**x ^{2}+7x-18 x^{2}+3x-54**

I know the second fraction needs to be flipped so it can be multiplied.

**7c+49 Divided by c ^{2}-49 ** So it would become: 7c+49 X 7c Then:
(7c+49) X 7

** 3 7c ** 3 c^{2}-49 3(c^{2}-49)