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(2x∧5+x∧4-5x³-6x∧5-3x³+15x²+10x²+5x-25)-(2x∧5+x)
-4x∧5+x∧4-8x³+25x²+5x-25-2x∧5-x
-6x∧5+x∧4-8x³+25x²+4x-25