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x2 + 10x2 + 8y2 - 7y2 - 16 + 11 =
11x2 + y2 - 5
dan dibuka dulu kurungnya
24x + 32y - 20x + 30y = (lalu diurutkan) 24x + 20x + 32y + 30y = 44x + 62y
dan dibuka dulu kurungnya (sama seperti yg kedua)
2a + 3ab + 8a2 + 10ab = 8ab2 + 2a + 13ab