Développer puis réduire chacune des expression: A= 7(x-3)² + 2x(5x-15)

B=(x+5)² - (x-13)(2x+1)

C= (5x+4)(5x-4) + (3x-4)²

D= 8(x-1)(3x7) - x(x-3)

E= (7x+9)² + (2x-1)(2-5x)

Merci
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