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-x²+5xy+4x²-4xy=3x²-1xy
4x+3y+6+2x-5y+2 = 6x-2y+8
-2p³+3p²-4p+2p³-p²+p
-4a²+a-3a²-4a = -7a²-3a
4a²-7-3a²-6=1a²-13
4x²+2x-7-x²+3x+2=3x²+5x-5
-2x³-4x²+6x-3x³+5x²-2x = -5x+1x²+4x
Semoga membantu^^