-3(-x^2yz)^2*1/3x(yz)^3-(-xyz)^3*(-xyz)^2=多少(过程也要)

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-3(-x^2yz)^2*1/3x(yz)^3-(-xyz)^3*(-xyz)^2=多少(过程也要)
-3(-x^2yz)^2*1/3x(yz)^3-(-xyz)^3*(-xyz)^2
=多少(过程也要)

-3(-x^2yz)^2*1/3x(yz)^3-(-xyz)^3*(-xyz)^2=多少(过程也要)
-3(-x^2yz)^2*1/3x(yz)^3-(-xyz)^3*(-xyz)^2
=-3(x^4y^2z^2)*1/3xy^3z^3+(xyz)^5
=-(x^5y^5z^5)+(x^5y^5z^5)
=0

这是初几的?