计算.化简4x²+2x+7+3x-8x²-26x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y
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计算.化简4x²+2x+7+3x-8x²-26x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y计算.化简4x²
计算.化简4x²+2x+7+3x-8x²-26x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y
计算.化简
4x²+2x+7+3x-8x²-2
6x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y
计算.化简4x²+2x+7+3x-8x²-26x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y
4x²+2x+7+3x-8x²-2=4x²-8x²+2x+3x+7-2=-4x²+5x+5
6x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y=6x²y-8x²y-6x²y+2xy-5xy-4x+2y²x²=-8x²y-4x-3xy+2y²x²