计算:(-3x^y)(1/3xy^2)=?
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计算:(-3x^2y)(1/3xy^2)=?
计算:(-3x^y)(1/3xy^2)=?
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
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计算2分之1xy²(-2xy)+3x²y的3次方=
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计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
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计算 (-4/3xy)(-3x^2y)^2=( )
计算=(-3x²y)/(1/3xy²)
计算:(1).(-2xy²)*(3x²y)²