1.-10x^2y-5xy^2+15xy；2.（2a+b)(2a-3b)+a(2a+b)；3.5a^3b（a-b）^3-10a^4b^3（b-a）^24.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)；5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23：15之前6.（x+3)^2-(x+3)

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1.-10x^2y-5xy^2+15xy；2.（2a+b)(2a-3b)+a(2a+b)；3.5a^3b（a-b）^3-10a^4b^3（b-a）^24.(3a-4b)(7a-8b)+(11a-12b

1.-10x^2y-5xy^2+15xy；2.（2a+b)(2a-3b)+a(2a+b)；3.5a^3b（a-b）^3-10a^4b^3（b-a）^24.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)；5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23：15之前6.（x+3)^2-(x+3)
1.-10x^2y-5xy^2+15xy；2.（2a+b)(2a-3b)+a(2a+b)；3.5a^3b（a-b）^3-10a^4b^3（b-a）^2
4.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)；5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23：15之前
6.（x+3)^2-(x+3)

1.-10x^2y-5xy^2+15xy；2.（2a+b)(2a-3b)+a(2a+b)；3.5a^3b（a-b）^3-10a^4b^3（b-a）^24.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)；5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23：15之前6.（x+3)^2-(x+3)
1.-10x^2y-5xy^2+15xy=5xy(3-2x-y；
2.（2a+b)(2a-3b)+a(2a+b)=(2a+b)[(2a-3b)+a]=(2a-3b)(3a-3b)=3(2a-3b)(a-b)；
3.5a^3b（a-b）^3-10a^4b^3（b-a）^2=5a³b(a-b)²[(a-b)-2ab²]=5a³b(a-b)²(a-b2ab²)；
4.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)=(7a-8b)[(3a-4b)-(11a-12b)]=(7a-8b)(8a-8b)=8(7a-8b)(a-b)；
5.x(b+c-d)-y(d-b-c)-c-b+d=x(b+c-d)+y(b+c-d)-(b+c-d)=(b+c-d)(x+y-1),6.（x+3)^2-(x+3)=(x+3)[(x+3)-1]=(x+3)(x+2)

这是要求什么没有说啊

(3x的2次方-2xy)/x+(10xy-15y的平方)-(-5y) ((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy) 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 当5xy/2x-y=2时,代数式2x-y/10xy的值是多少?代数式15xy/6x-3y的值是多少? x^2-xy/xy-y^2约分 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 2x²y-3(2xy-xy)-xy 1.已知x+y=-4,xy=3,求5（2分之1xy+2y）+[6x-(2xy+y-3x)]的值2.已知（x+3）^2+|x-y+10|=0求代数式5x^2y-[2x^2y-(3xy-xy^2)-3x^2]-2xy^2-y^2的值 1.（xy-1）^2-(x+y-2xy)(2-x-y)2.(x+y)(x+y+2xy)+(xy-1)(xy+1) 5x^2y/-1/2xy*3xy^2 2xy+5y^2+( )=x^2+3xy 3X^2+XY+Y=15 求XY. 化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]} 计算：5xy^2-[3xy^2-(4xy^2-2x^2y)]+2x^2y-xy^2 5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2求 5xy^2-{2x^y-[3xy^2-（xy^2-2x^2y）]/（-1/2xy）} 5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简）