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=2x²+2y+2x²y+5x²-y
=7x²+y+2x²y
(jumlahkan konstanta yang pangkat dan variabelnya sama)
=2x² + y + y + x²y + 5x² - y + x²y
=7x² + y + 2x²y (susun berdasarkan pangkat terbesar)
=7x² + 2x²y + y