[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
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[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)=(4X^2Y
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
=(4X^2Y^2-9+X^2Y^2+6XY+9)/(-XY)
=(5X^2Y^2+6XY)/(-XY)
=-5XY-6
(-3xy+2xy)-(4xy+xy)
3xy-3xy-xy+2yx
3xy-4xy-（-2xy）
3xy-4xy-（-2xy）
2xy.(-3xy)÷(xy)
2xy-xy-(-3xy)=
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
xy－3xy＋2xy－xy
3xy^2*(-2xy)
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
3(xy－xy)－2(xy＋xy)＋3xy
(-4xy^3)×（-xy）+（-3xy^2）^2
（-3xy^2)^2+(-4xy^3)*(-xy)=多少
(-4xy^3)*(-xy)+(-3xy^2)^2
(3xy^2)^2+(-xy^3)(4xy)
1/2xy(2/3xy²-2xy)
3(xy-z)^2-(2xy+z)(-z+2xy)
2x²y-3(2xy-xy)-xy