y^5x(y^5)^2一2x(y^5)^3
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y^5x(y^5)^2一2x(y^5)^3y^5x(y^5)^2一2x(y^5)^3y^5x(y^5)^2一2x(y^5)^3原式=(y^5)^3-2*(y^5)^3=-(y^5)^3=-y^15
y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
原式=(y^5)^3-2*(y^5)^3
=-(y^5)^3
=-y^15
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
y^5x(y^5)^2一2x(y^5)^3
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