1、y)22(53t)(53t)(22n)(22n)m22x2(2y3x)(2y3x)(mn4n)(mn4n)(x2y)12(x2y)12(x2y)1(x2y)18(4(22a)(22a)(2m3)(2m3)m24x2(x4)(x4)(2n3m4)(2n3m4)(2a2b)2(2a2b)2(mn4)(mn4)6(m2n)1(m2n)1m22x2(x4)(x4)(22a)2(22a)2(22a)(22a)2(2(2a2b)(2a2b)(mn4)(mn4)m23x2(x2y)1(x2y)1(2x3y)(2x3y)(mn4)2(mn4)2(x2y)(x2y)x5y)23(2n3m)(2n3m)3x2(5
2、3x)(53x)(53t)(53t)2(m1)(m1)(2n3m)(2n3m)m22x2(2x2y)(2x2y)(22ab)(22ab)(2n3m)2(2n3m)2(4y)(4y)x2y)23(53t)(53t)(m1)(m1)m2(4yx)(4yx)x6y)22(2x3)(2x3)(m2n)(m2n)m24x2(x1)(x1)(2abc)(2abc)(4y)2(4y)24(2n3m)(2n3m)4x2(2x3)(2x3)(x2yz)(x2yz)(2n3m)(2n3m)x3y)23(x2y)1(x2y)12x2(4x)(4x)(x2y)2(x2y)23(22a)(22a)4(2x3)(2x3)4x2(53x)(53x)3(m1)(m1)(2m2n)(2m2n)m24x2(22x)(22x)