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(x-3)²
x²-6x+9
(x+5) (x-5)
x²-5²
x²-25
(x-3)²(x²-25)
(x²-6x+9)(x²-25)
x∧4-25x²-6x³+150x+9x²-225
x∧4-16x²-6x³+150x-225
x(x³-16x-6x²+150)-225