Bases mathématiques

1) $\frac{3\left(3x + 1\right)}{5x} \left(x \notin \left\{1,2,-\frac{1}{3}\right\}\right)$

2) $\frac{-3\left(x-1\right)\left(2x+1\right)}{x\left(x+1\right)^2} \left(x \notin \left\{0,-1\right\}\right)$

3) $\frac{x-4}{x-5} \left(x \notin \left\{-1,5\right\}\right)$

4) $\frac{\left(2x+1\right)\left(2x-3\right)}{x\left(x-1\right)} \left(x \notin \left\{0,1\right\}\right)$

Exercices de vérification