Exercice n•2 et n•3 Urgent !!!

exercice 2:
A-4(x-3)-(x²+3x+10)+1=4x-12-x²-3x-10+1=x-21-x²
B-5x(x-2)+2x²+5x-10=5x²-10x+2x²+5x-10=7x²-5x-10
C-(4x+2)(4x-1)=16x-4x+8x-2=20x-2
D-(x-4)(3x-2)+(-2x²-3x+6)=3x²-2x-12x+8-2x²-3x+6=x²-17x+14
exercice3:
E - 11(5x+2)
I- 5(5x+5)