合并下列各式的同类项!(1)4x²-y-8xy²+2x²y-3xy²(2)3x²-1-2x-5+3x-x²(3)-0.8x²y-6xy-1.2x²y+5xy+x²y

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合并下列各式的同类项!(1)4x²-y-8xy²+2x²y-3xy²(2)3x²-1-2x-5+3x-x²(3)-0.8x²y-6xy-1.2x²y+5xy+x²y
合并下列各式的同类项!
(1)4x²-y-8xy²+2x²y-3xy²
(2)3x²-1-2x-5+3x-x²
(3)-0.8x²y-6xy-1.2x²y+5xy+x²y

合并下列各式的同类项!(1)4x²-y-8xy²+2x²y-3xy²(2)3x²-1-2x-5+3x-x²(3)-0.8x²y-6xy-1.2x²y+5xy+x²y
(1)4x²-y-11xy²+2x²y
(2)2x²+x-6
(3)-x²y-xy