计算 -3(2x²-xy)+4(x²+xy-6)-8m²-【4m-2m²-(3m-m²-7)-8】
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计算-3(2x²-xy)+4(x²+xy-6)-8m²-【4m-2m²-(3m-m²-7)-8】计算-3(2x²-xy)+4(x²
计算 -3(2x²-xy)+4(x²+xy-6)-8m²-【4m-2m²-(3m-m²-7)-8】
计算 -3(2x²-xy)+4(x²+xy-6)
-8m²-【4m-2m²-(3m-m²-7)-8】
计算 -3(2x²-xy)+4(x²+xy-6)-8m²-【4m-2m²-(3m-m²-7)-8】
-3(2x²-xy)+4(x²+xy-6)
=-6x²+3xy+4x²+4xy-24
=-2x²+7xy-24
-8m²-【4m-2m²-(3m-m²-7)-8】
=-8m²-4m+2m²+3m-m²-7+8
=-7m²-m+1