1、(x9)(4x9)(4xy)(xy)(2x2y)(x23xyy2)(4mn)(mn)(a1)2(3ab)(2a7b)(x24)(x2)(x22x1)(x1)(x3)(x2)(x6)(x4)(y2)(y3)(y3)(y2)(x4)(5x2)9a(8a5b)(4x6y)(2x) 7 1(ab22ab)ab33x(x4)2x(2x2)2x(x4) 6 7(3x4)(x8)(3x4y)(x2y)(x2y)(x2xyy2)(mn)(mn)(2a1)2(ab)(a6b)(4x24)(3x8)(4x24x2)(3x3)(x1)(x1)(x4)(x5)(y2)(y1)(y4)(y2)(7x4)(9x7)5a(
2、2a9b)(9x2y)(9x) 3 1(ab35ab)abx(x1)2x(x2)2x(2x1) 4 3(2x6)(x9)(x5y)(xy)(2xy)(x2xyy2)(3m4n)(m7n)(2a1)2(4ab)(ab)(x28)(4x3)(2x2x2)(3x3)(x2)(x1)(x6)(x4)(y4)(y3)(y3)(y3)(4x3)(2x5)8a(4a5b)(5x9y)(6x) 4 1(ab22ab)ab3x(x4)x(4x2)x(x2) 3 4(x2)(3x7)(x8y)(4xy)(2x2y)(x22xyy2)(mn)(2m6n)(4a1)2(3a8b)(ab)(x22)(x9)(3x2x3
3、)(x2)(x2)(x2)(x6)(x5)(y3)(y2)(y3)(y3)(4x2)(3x1)8a(8a9b)(3x2y)(7x) 4 1(ab25ab)abx(3x1)3x(4x2)x(x4) 3 4(3x4)(4x1)(4xy)(x7y)(x2y)(x2xyy2)(m7n)(m2n)(a1)2(2a5b)(3ab)(x23)(x1)(2x24x3)(3x2)(x1)(x3)(x4)(x6)(y3)(y2)(y4)(y1)(x2)(7x4)5a(9a3b)(6x3y)(4x) 5 1(ab26ab)ab3x(x4)x(4x4)x(3x3) 4 5(4x3)(3x9)(x4y)(2x6y)(3
4、x3y)(x22xyy2)(4mn)(m3n)(2a3)2(2a5b)(2ab)(3x26)(x3)(x2x1)(2x3)(x4)(x3)(x2)(x5)(y4)(y3)(y4)(y1)(x4)(5x8)7a(5a8b)(3x7y)(9x) 3 1(ab25ab)ab23x(x3)2x(x1)3x(x2) 4 3(x5)(4x1)(4x3y)(x4y)(x2y)(x2xyy2)(mn)(4mn)(3a4)2(ab)(a7b)(4x25)(x8)(x2x1)(3x3)(x4)(x1)(x4)(x5)(y1)(y2)(y4)(y3)(7x2)(3x1)5a(3a9b)(6x2y)(7x) 4 1(
5、ab26ab)ab2x(x3)x(3x4)3x(4x3) 3 4(4x8)(x7)(3xy)(2x8y)(xy)(x2xyy2)(3mn)(m2n)(a4)2(a4b)(ab)(x28)(2x1)(x24x2)(x1)(x4)(x2)(x5)(x4)(y2)(y2)(y1)(y3)(6x4)(7x6)9a(2a4b)(6x3y)(4x) 5 1(ab26ab)abx(x3)3x(x1)x(x1) 6 5(3x6)(x8)(3xy)(4x8y)(2x3y)(x2xyy2)(mn)(3m7n)(a2)2(ab)(a7b)(x28)(x4)(3x2x3)(x2)(x2)(x3)(x2)(x4)(y1
6、)(y2)(y1)(y2)(5x4)(5x8)9a(8a8b)(2x9y)(9x) 5 1(ab32ab)ab2x(x4)x(x3)x(x2) 4 5(x3)(4x7)(2x3y)(3x8y)(x3y)(x22xyy2)(2mn)(m6n)(a4)2(a6b)(a7b)(4x29)(x1)(3x2x2)(3x3)(x3)(x1)(x2)(x3)(y4)(y3)(y4)(y1)(5x2)(7x4)5a(2a7b)(9x2y)(9x) 6 1(ab33ab)abx(x3)x(x1)x(x1) 5 6(x8)(x6)(4xy)(x4y)(3xy)(x22xyy2)(mn)(2m5n)(a1)2(ab
7、)(4a9b)(2x25)(4x2)(x2x1)(2x1)(x2)(x1)(x5)(x1)(y4)(y3)(y2)(y2)(x3)(7x2)9a(5a3b)(9x4y)(8x) 5 1(ab26ab)ab3x(3x4)4x(x3)x(x1) 6 5(2x6)(x3)(4xy)(3x2y)(3xy)(x23xyy2)(4mn)(4m7n)(a1)2(3ab)(ab)(3x26)(2x2)(x22x3)(4x3)(x3)(x3)(x6)(x2)(y1)(y3)(y1)(y3)(6x4)(6x4)9a(7a4b)(9x7y)(9x) 5 1(ab24ab)abx(x4)2x(3x2)x(4x4) 6
8、 5(x9)(3x7)(3x5y)(x6y)(2xy)(x2xyy2)(4m9n)(3m6n)(a1)2(2ab)(2ab)(x27)(x1)(2x23x3)(x1)(x2)(x3)(x1)(x6)(y1)(y2)(y1)(y1)(x3)(3x1)2a(8a7b)(7x9y)(3x) 2 1(ab23ab)ab3x(x4)4x(x1)4x(x2) 3 2(4x9)(x6)(4x2y)(x2y)(x2y)(x23xyy2)(m2n)(mn)(a3)2(ab)(3a6b)(3x22)(2x9)(x22x3)(x3)(x2)(x2)(x1)(x6)(y1)(y3)(y1)(y3)(2x4)(6x5)5a(4a6b)(3x3y)(5x) 4 1(ab22ab)ab2x(x1)x(3x4)x(2x1) 3 4(x4)(x7)(xy)(x4y)(3x2y)(x2xyy2)(3mn)(mn)(a2)2(2ab)(4ab)(2x24)(4x8)(3x23x1)(2x3)(x1)(x2)(x2)(x1)(y2)(y2)(y1)(y3)(x3)(7x6)2a(7a8b)(5x9y)(8x) 3 1(ab22ab)ab2x(x4)x(4x1)x(x2) 4 3
