(-x)^3•(x^3)^3•x^2-(-x^4)^2 (-x^6)
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(-x)^3•(x^3)^3•x^2-(-x^4)^2 (-x^6)
(-x)^3•(x^3)^3•x^2-(-x^4)^2 (-x^6)
(-x)^3•(x^3)^3•x^2-(-x^4)^2 (-x^6)
0
原式=-x^(3+3*3+2)-(x^8)*(-x^6)
=-x^14+x^14
=0