Evaluate
125\left(a+1\right)^{3}
Expand
125a^{3}+375a^{2}+375a+125
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125a^{3}+375a^{2}+375a+125
Use binomial theorem \left(p+q\right)^{3}=p^{3}+3p^{2}q+3pq^{2}+q^{3} to expand \left(5a+5\right)^{3}.
125a^{3}+375a^{2}+375a+125
Use binomial theorem \left(p+q\right)^{3}=p^{3}+3p^{2}q+3pq^{2}+q^{3} to expand \left(5a+5\right)^{3}.
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