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-3\left(x^{3}-3x^{2}+3x-1\right)+5
Use binomial theorem \left(a-b\right)^{3}=a^{3}-3a^{2}b+3ab^{2}-b^{3} to expand \left(x-1\right)^{3}.
-3x^{3}+9x^{2}-9x+3+5
Use the distributive property to multiply -3 by x^{3}-3x^{2}+3x-1.
-3x^{3}+9x^{2}-9x+8
Add 3 and 5 to get 8.
-3\left(x^{3}-3x^{2}+3x-1\right)+5
Use binomial theorem \left(a-b\right)^{3}=a^{3}-3a^{2}b+3ab^{2}-b^{3} to expand \left(x-1\right)^{3}.
-3x^{3}+9x^{2}-9x+3+5
Use the distributive property to multiply -3 by x^{3}-3x^{2}+3x-1.
-3x^{3}+9x^{2}-9x+8
Add 3 and 5 to get 8.