xy^3+3=18 那xy^3+12=?
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xy^3+3=18 那xy^3+12=?
4xy+6xy-3xy=?
2xy-xy-(-3xy)=
6xy/3xy=?
(-3xy^2)^2+(-4xy^3)*(-xy)=多少
xy×(xy)²-3xy
(-3xy+2xy)-(4xy+xy)
2XY^2×(-3XY)^2=
已知x+y=12,xy=9,求(x+3xy+y)/(xy+xy)的值
化简:xy分之3x^2+2xy-xy分之2x^2-xy=
3xy-3xy-xy+2yx
3xy-4xy-(-2xy)
3xy-4xy-(-2xy)
2xy.(-3xy)÷(xy)
当x=3,y=3分之1时,求代数出3xy-[2xy-2(xy-2分之3xy)+xy]+3xy的值
3xy-[2xy-2(xy-2分之3xy)+xy]+3xy,其中x=3,y=负3分之一大神们帮帮忙
已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)