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- 7) $$\frac{-x}{-x} =$$
- 8) $$\frac{2a}{-2a} =$$
- 10) $$\frac{-a^2b}{a^2b} =$$
- 1) $$\frac{-(x+y)}{(x+y)} =$$
- 2) $$\frac{-2(a+b)}{(a+b)} =$$
- 3) $$\frac{(x+3)}{-5(x+3)} =$$
- 4) $$\frac{2(b+1)}{-(b+1)} =$$
- 5) $$\frac{-(x-3)}{12(x-3)} =$$
- 6) $$\frac{(a+5)(a+5)}{(5+a)(5-a)} =$$
- 7) $$\frac{13+x}{(x+13)\cdot b} =$$
- 8) $$\frac{-(y-1)}{-(1+y)} =$$
- 9) $$\frac{2(a-b)}{3(b-a)} =$$
- 10) $$\frac{5(x-y)}{a(y-x)} =$$
- 11) $$\frac{x(y+3)}{2(-y-3)} =$$
- 12) $$\frac{5(-2+a)}{3(a-2)} =$$
- 13) $$\frac{(y-1)}{3(-1+y)} =$$
- 14) $$\frac{a(a-1)}{-(1-a)} =$$
- 15) $$\frac{(y-1)(y-1)}{(1-y)(1+y)} =$$
- 16) $$\frac{(y+1)(y-1)}{(-y-1)} =$$
- 17) $$\frac{-6-a}{-6-a} =$$
- 17) $$\frac{5x-y}{5x-y} =$$
- 18) $$\frac{-2a+b}{-2a+b} =$$
- 19) $$\frac{-5+x}{x-5} =$$
- 20) $$\frac{y-4}{-4+y} =$$
