Evaluate
\left(h-4\right)\left(\left(h-2\right)^{2}+2h\right)
Expand
h^{3}-6h^{2}+12h-16
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-8+12h-6h^{2}+h^{3}-8
Use binomial theorem \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} to expand \left(-2+h\right)^{3}.
-16+12h-6h^{2}+h^{3}
Subtract 8 from -8 to get -16.
-8+12h-6h^{2}+h^{3}-8
Use binomial theorem \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} to expand \left(-2+h\right)^{3}.
-16+12h-6h^{2}+h^{3}
Subtract 8 from -8 to get -16.
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