计算:(1)x2-(x3y-2x2y2)﹢xy(2)(1-12)×(1+12)×(1+14)×(1+116)(3)(2x-3y)2-(y+3x
计算:(1)x2-(x3y-2x2y2)﹢xy(2)(1-12)×(1+12)×(1+14)×(1+116)(3)(2x-3y)2-(y+3x)(3x-y)(4)(2a3...
计算:(1)x2-(x3y-2x2y2)﹢xy(2)(1-12)×(1+12)×(1+14)×(1+116)(3)(2x-3y)2-(y+3x)(3x-y)(4)(2a3b2-4a4b3+6a5b4)÷(-2a3b2)
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