计算 (-x+y)∧4×(x-y)∧2×(y-x)∧3
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算:(x-4y)(2x+3y)-(x+2y)(x-y).
计算 (2y-3)(y+4) (-5x+2)∧2 (2x-3y)(2x+3y) (2x-5)(x-2)-(-4+3x)(
计算:(3x-y)2-(2x+y)2+5x(y-x)
(x+y)^2-(3x-2y)^2计算
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
计算:(-x-2y) * (3x-y)
计算(x+y)(x+y)^2(-x-y)^3