计算(3b+2a)(2a-3b) (3m-2n)(-3m-2n) (xy-5)(-xy-5) (-2x)²-)(-2x+3)(-2x-3)

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计算(3b+2a)(2a-3b)(3m-2n)(-3m-2n)(xy-5)(-xy-5)(-2x)²-)(-2x+3)(-2x-3)计算(3b+2a)(2a-3b)(3m-2n)(-3m-2

计算(3b+2a)(2a-3b) (3m-2n)(-3m-2n) (xy-5)(-xy-5) (-2x)²-)(-2x+3)(-2x-3)
计算(3b+2a)(2a-3b) (3m-2n)(-3m-2n) (xy-5)(-xy-5) (-2x)²-)(-2x+3)(-2x-3)

计算(3b+2a)(2a-3b) (3m-2n)(-3m-2n) (xy-5)(-xy-5) (-2x)²-)(-2x+3)(-2x-3)
括号里 一正一负 正好是整数的平方-负数的平方.
比如
(a+b)*(a-b)=a*a-b*b