Efectuati produsele si reduceti termenii asemenea:
A) (x+5)(2×-3)-2×(×+4)+(×-2)(×-3)
B) (3×+1)(×-4)-3×(×-4)-(×+3)(×+4)
C) (×+4)(2×-5)+(2×+3)(×+1)-4×(×+2)