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7xpangkat2 - 5xpangkat2 -7xy + 10xy + 14x + 5x =
2xpangkat2 + 3xy + 19xy
Semoga membantu.. Maaf jika salah...
7x^2-7xy+14x-5x^2+10xy+5x
7x^2-5x^2-7xy+10xy+14x+5x
2x^2+3xy+19x