1、2 8 x5x7x18 4.5y4.5y3y6y4y1.5y21.5 x9x77y97y6 9x(3x1)8x5(x5)7 9 5 bbb43 6x5(x9)62(x4)8 2 4 4(x7)7x 4x3(3x4)94(x5)44(x5)56(79.5x) 5(x7)4x 1 1 9(x1)3x8(x5) 6y93y7 4 3 x4 3x 42 8x4.5x4 5 3 x2 3x4 6x4 2(x1)5x4a(47a)-5 9b(2b6)296x2(6x2)11 8y4(6y5)93(x6)6(x6) 2x6(x5)7x4 2x3 x3.5x13 4 8 9x6 6x3 5x6(x3) 6 9
2、 6y4 5y4 6 3(61.5y)(4y9)5y5 2y1 2y2 5 2(x6)5(x2) 2 8 12 3x1 7x8 x6.5x5 2 5 8x8 6x1 2x3(x7)xx56 x4x53x11.5x8x8.5x451091 7x x 7 4x3.5x50.558 2 3x2211x x2.5x15x6x7 x88x2 4 9 1 x4x x1x6x207x9x8x17 7y2.5y5y146y6y7y55.5 x4x75y53y8 4x(7x7)2x2(x6)5 3 3 46 4x2(x9)83(x9)4 4 4 3(x7)8x 2x3(4x2)52(x7)82(x4)46(43
3、.5x) 5(x8)3x5(x6)4x3(x3) y33y3 4 2 22 9x8.5x3 3 2 x2 2x4 6x5 2(x4)8x9a(42a)4 7b(2b2)309x2(4x2)13 9y4(6y4)22(x6)8(x4) 9x4(x5)9x7 7x8 x8.5x20 2 7 4x9 7x4 8x5(x4) 3 12 4y9 2y3 1 6(101.5y)(4y4)7y2 8y4 6y2 4 3(x4)5(x6) 2 6 10 3x6 2x4 9x6.5x15 2 6 2x6 3x7 9x4(x5) 9 xx59 8x4x6x4.5x6x13.5x301087 3x x 14 x2.
4、5x44.512 4 2x32020x 7x0.5x20x2x9 x38x43 9 x7x 7x4.5x8x10x6x8x13 y8y8y101.5y3.5y7.5y84 x8x62y58y5 8x(7x8)2x4(x5)bbb25 9x2(x1)84(x9)8 4 8 2(x7)7x 6x2(2x7)84(x6)22(x10)64(16x) 5(x6)7x2(x1)6x3(x7) 5y73y5 2 3 x4 3x 46 x0.5x11 4 4 x1 2x3 5x3 5(x6)9x5a(53a)4 5b(3b4)224x4(4x8)18 9y2(6y6)93(x3)5(x3) 6x4(x5)7
5、x8 5x7 6x4.5x122x5 7x3 5x3(x9) 6 12 4y3 5y4 2 2(74y)(2.5y8) 2 8 5y6 6y8 2y2 5 3(x3)6(x1) 4 6 12 4x4 4x6 4x5.5x17 3 7 4x9 6x2 4x2(x5)6xx56 8x6x2x1.5x2x1.5x101012 19 8x1.5x71.594 8 2x4618x x8.5x13x1x8 3x87x21 7 x6x x6x9x154 2 x6x5x3 y6.5y10y87.5y6y5y86 x3x3y48y7 8x(8x3)6x2(x5)7 3 3 bbb41 8x5(x3)33(x3)8 8 8 5(x9)4x 5x4(5x3)84(x9)82(x3)88(39.5x) 4(x1)2x6(x1)5x8(x5) y77y3x3 2x 66 x2.5x14 2 2 x3 3x1 7x3 4(x2)3x7a(49a)-2 4b(4b4)239x4(2x2)20 3y3(4y4)24(x6)5(x3) 5x2(x9)4x5 2x2 7x1.5x27x9 6x3 5x2(x9)4y7 3y1 1 3(41.5y)(3y7)5y4 9y2 5y9 1 3(x5)6(x2)3x3 8x3 x9.5x138x9 3x3 4x6(x2) 3 9
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