x(x+y)(x–y)∧3–x∧2(y–x)∧3这是第二个：(a-3)∧2-2(2a-6)

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x(x+y)(x–y)∧3–x∧2(y–x)∧3这是第二个：(a-3)∧2-2(2a-6)
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x(x+y)(x–y)∧3–x∧2(y–x)∧3这是第二个：(a-3)∧2-2(2a-6)
x(x+y)(x–y)∧3–x∧2(y–x)∧3
这是第二个：
(a-3)∧2-2(2a-6)

x(x+y)(x–y)∧3–x∧2(y–x)∧3这是第二个：(a-3)∧2-2(2a-6)
x(x+y)(x–y)∧3–x∧2(y–x)∧3
=（x²+xy）(x–y)∧3+x²(x–y)∧3
=（2x²+xy）(x–y)∧3
(a-3)∧2-2(2a-6)
=(a-3)(a-3)-2*2(a-3)
=(a-3-4)(a-3)
=(a-7)(a-3)

第一个X(2X+Y)(X+Y)^3
第二个(a-3)(a-7)

x(x+y)(x–y)∧3–x∧2(y–x)∧3
=（x²+xy）(x–y)∧3+x²(x–y)∧3
=（2x²+xy）(x–y)∧3
(a-3)∧2-2(2a-6)
=(a-3)(a-3)-2*2(a-3)
=(a-3-4)(a-3)
=(a-7)(a-3)

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