Regularización: suma y resta de fracciones algebraicas

Resta\frac{-3x+1}{(x-3)^2}+\frac{2x+1}{x-3}=

Resta\frac{2x+7}{x^2-4}+\frac{x+1}{x-2}=

Suma \frac{4x-3}{x}+\frac{2x-1}{x+1}=

Suma \frac{1}{x-1}-\frac{2}{x+2}-\frac{3}{x+3}=

Suma \frac{1}{2x}+\frac{1}{4x^2}+\frac{1}{8x^3}=

Suma \frac{x+1}{5x}+\frac{x+1}{x^2}+\frac{x+1}{15x^3}=

Suma \frac{4}{x}-\frac{8}{x^2}-\frac{10}{x^3}=

Suma \frac{8}{x^2}-\frac{5}{x^4}+\frac{6}{x^6}=

Resta \frac{8x-1}{x+4}-\frac{2x-3}{x-3}=

Resta \frac{-3x+1}{x-2}-\frac{-2x+1}{x+1}=

Resta\frac{2x+1}{x+2}-\frac{2x+4}{(x+2)^2}=