Evaluate
\frac{\left(12s+1\right)^{2}}{9}
Expand
16s^{2}+\frac{8s}{3}+\frac{1}{9}
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16s^{2}+\frac{8}{3}s+\frac{1}{9}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4s+\frac{1}{3}\right)^{2}.
16s^{2}+\frac{8}{3}s+\frac{1}{9}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4s+\frac{1}{3}\right)^{2}.
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