1、20.319.7 59962(7a)3b32a2b2 (x2y4x4y3z3)4x2y24(x1)2(3x3)(3x2) 4(yz)2(2yz)(3yz)x249y2 (qa)(xy)(qa)(5x3y)a26am9m2 912(mb)4(mb)2c349c x4256(2x2y2)2(x2y3)3 (4ab)(5ab)3x(x5)(x1) (6x6y3)23.32.7 7002(4a)3b36a2b2 (x2y27x3y4z3)xy(x3)2(3x1)(3x1) (yz)2(2yz)(3yz)49x2y2 (pb)(5x5y)(pb)(xy)a28ax16x2 428(qd)49(qd)2b
2、381b 81x481(3x3y)2(x3y2)3 (3ab)(ab)2x(x5)(x3) (x5y2)25.34.7 7012(7a)2b214ab (x2y26x4y2z4)3x2y3(x2)2(2x3)(2x2) 3(yz)2(4yz)(4yz)16x2y2 (qa)(x4y)(qa)(x6y)a26ax9x2 3660(dq)25(dq)2a316a 16x481(2xy)3(x2y)2 (5a6b)(ab)3x(x5)(x5) (xy3)27.16.9 6962(3a)2b318ab2 (4x2y44x2y2z3)8xy(x2)2(3x2)(4x4) (yz)2(4yz)(2yz)x
3、2y2 (dn)(x2y)(dn)(xy)a212am36m2 2560(dm)36(dm)2c381c 16x481(3xy)2(x2y3)2 (a5b)(3ab)3x(x3)(x1) (4xy3)280.479.6 4042(2a)2b28ab (x4y32x3y3z3)3xy3(x2)2(3x5)(2x2) (yz)2(3yz)(3yz)x2y2 (bm)(xy)(bm)(x3y)a220an100n2 3648(bn)16(bn)2a39a 16x4256(2x2y)3(x2y2)3 (2ab)(a2b)3x(x2)(x4) (2x5y1)270.169.9 4992(3a)3b36a
4、b2 (7x3y23x2y3z4)3xy2(x1)2(2x1)(2x5) 4(yz)2(2yz)(4yz)x281y2 (qb)(x6y)(qb)(4x2y)a218an81n2 48(nd)4(nd)2d381d 81x481(3xy)3(xy2)2 (3a2b)(4ab)3x(x2)(x4) (2xy2)25.44.6 796212ab2 (3x4y23x4y2z2)9x2y(x2)2(2x1)(2x4) (yz)2(2yz)(4yz)x2y2 (nd)(6xy)(nd)(xy)a218am81m2 2560(dn)36(dn)2c316c x481(3x3y2)2(xy)2 (a3b)(
5、2a5b)3x(x2)(x3) (xy1)23.22.8 10042(6a)2b28ab2 (x3y3x3y4z2)x2y3(x4)2(4x4)(4x1) (yz)2(2yz)(2yz)49x2y2 (aq)(2x4y)(aq)(xy)a24ax4x2 936(ma)36(ma)2b39b x41(2x3y2)2(xy)2 (a3b)(2ab)2x(x4)(x5) (x3y1)280.379.7 5042(8a)3b46ab (8x4y35x3y2z4)xy2(x2)2(2x2)(2x3) (yz)2(4yz)(2yz)x2y2 (pc)(2xy)(pc)(xy)a216am64m2 1640
6、(aq)25(aq)2a325a x4256(3xy3)2(xy)2 (a3b)(a6b)3x(x3)(x2) (xy1)260.359.7 99952(3a)2b418ab2 (x4y42x2y3z3)2x2y22(x4)2(3x2)(4x4) (yz)2(2yz)(3yz)x2y2 (pc)(xy)(pc)(x5y)a26ab9b2 936(na)36(na)2(2xy3)3(x3y3)2 (5ab)(a6b)3x(x1)(x3) (4xy2)24.6 8002(2a)3b36a2b2 (3x2y4x3y3z2)x2y2(x1)2(3x5)(3x4) 4(yz)2(3yz)(3yz)x2y
7、2 (cm)(x6y)(cm)(x4y)a212an36n2 1632(pc)16(pc)2a336a x4256(3x3y)2(x3y3)2 (5a6b)(4a3b)2x(x1)(x5) (2x2y1)22.11.9 9052(7a)3b46ab2 (9x4y4x4y2z2)2(x1)2(4x4)(2x2) (yz)2(4yz)(2yz)x281y2 (qd)(xy)(qd)(xy)a218ab81b2 2530(dm)9(dm)2b336b 81x4256(2x2y3)2(x2y)2 (6a3b)(ab)3x(x4)(x1) (xy2)22.31.7 40002(7a)2b320a2b (
8、3x2y3x3y4z4)6x2y2(x4)2(3x3)(2x4) 3(yz)2(3yz)(3yz)x281y2 (aq)(3xy)(aq)(xy)a220ab100b2 3636(mb)9(mb)2d336d 81x4256(3x2y2)2(xy)2 (a6b)(ab)3x(x2)(x1) (5xy2)230.129.9 79982(4a)2b26a2b (2x4y45x2y2z3)x2y3(x2)2(4x2)(2x5) 2(yz)2(4yz)(4yz)x2100y2 (am)(3x5y)(am)(x2y)a218an81n2 412(bq)9(bq)2c381c x41(2xy)3(x3y)
9、2 (4ab)(4ab)2x(x3)(x1) (x5y3)22.41.6 6012(5a)3b32a2b (3x3y3x4y2z2)5xy2(x2)2(2x2)(4x4) (yz)2(2yz)(4yz)9x216y2 (ma)(x4y)(ma)(3xy)a212ay36y2 428(ma)49(ma)2c336c 81x4256(3xy)3(xy3)3 (a5b)(4ab)2x(x4)(x4) (6xy2)210.39.7 1972(8a)2b38a2b (9x2y37x4y4z4)6x2y3(x3)2(3x5)(4x1) 2(yz)2(4yz)(4yz)9x2y2 (dm)(2x5y)(dm
10、)(4x6y)a212ay36y2 48(pa)4(pa)2b39b 81x481(2xy)2(x3y2)3 (a4b)(4ab)2x(x2)(x4) (xy4)27.26.8 70022(8a)2b410a2b2 (x4y3x3y4z4)4xy24(x1)2(4x4)(4x3) (yz)2(4yz)(4yz)x2y2 (na)(x2y)(na)(x3y)a26ax9x2 3624(pa)4(pa)2c336c x41(2xy3)2(x3y3)2 (ab)(4a4b)2x(x3)(x4) (x3y3)220.119.9 5982(6a)3b32a2b2 (8x4y49x4y4z4)5xy22(
11、x4)2(4x1)(2x1) 4(yz)2(4yz)(3yz)4x2y2 (am)(5xy)(am)(xy)a214ab49b2 428(ap)49(ap)2a381a 81x4256(3xy2)2(xy2)3 (5ab)(a5b)2x(x4)(x1) (4x4y1)270.269.8 1962(2a)3b312a2b2 (x4y34x3y2z4)xy4(x2)2(3x3)(2x4) 3(yz)2(3yz)(4yz)25x2y2 (pb)(3x4y)(pb)(x3y)a212ab36b2 912(bp)4(bp)2d336d x4256(2x3y3)2(x2y)3 (a6b)(ab)3x(x1
12、)(x3) (x3y4)21.9 9012(6a)3b26ab (2x3y47x4y3z4)x2y(x3)2(2x5)(3x1) (yz)2(3yz)(3yz)x249y2 (ma)(2xy)(ma)(6xy)a28ab16b2 2570(an)49(an)2c349c x481(2xy3)2(x3y3)2 (ab)(2a4b)2x(x3)(x2) (2x5y4)230.429.6 5962(2a)3b318a2b (x4y43x2y4z3)6xy(x1)2(2x1)(2x4) (yz)2(4yz)(4yz)x2y2 (qc)(x5y)(qc)(4x3y)a216ay64y2 2530(dq)
13、9(dq)2b336b x4256(2x2y)2(x3y3)3 (a4b)(a3b)3x(x4)(x1) (2x2y2)270.369.7 30052(5a)3b418a2b2 (6x3y48x3y2z4)4(x2)2(2x4)(4x1) (yz)2(2yz)(3yz)16x2y2 (dq)(5x4y)(dq)(2xy)a216ab64b2 1656(mb)49(mb)2a3100a 16x4256(3xy2)3(x3y)2 (3a4b)(ab)2x(x3)(x3) (xy3)22.21.8 10002(6a)3b34ab2 (x2y37x3y4z4)3x2y23(x2)2(3x4)(4x4) (yz)2(4yz)(3yz)x2y2 (bm)(x4y)(bm)(2x2y)a216an64n2 428(nd)49(nd)2a34a 16x4256
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