Evaluate
4\left(s+1\right)
Expand
4s+4
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s^{2}+4s+4-s^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(s+2\right)^{2}.
4s+4
Combine s^{2} and -s^{2} to get 0.
s^{2}+4s+4-s^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(s+2\right)^{2}.
4s+4
Combine s^{2} and -s^{2} to get 0.
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