5x - 8x, 7a - -10a, 24b3 - -45b3, 25x2 - 19x2, 64y - 123y, 28 - 72, 11xy - 36xy, -25x2y - 16x2y, 84a2 - -59a2, 66b - -42b, 12b2 - -3b2, 23c - 52c, -46c3 - 34c3, 24ab - -83ab, 8y2 - -9y2,

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