BONNE ANNEE

Donner la forme quotient factorisé et simplifier :  

a) [3-5(x-1)]/[(x-1)(2x+5)]  
b) [(2x-1)/(x+1)]+(4/x)-3  
c) [(5x+3)/(x²-1)]+[(1/x+1)]-[(2/x-1)]  
d) [(x+1)/x]+[3/(x-1)]-[(5x-2)/(x²-x)]  

Merci