Solve for m_2
m_{2}=\frac{E}{\pi ^{2}}
Solve for E
E=\pi ^{2}m_{2}
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E = m 2 * \pi ^ {2}
Substitute 2 * \pi for \tau.
m_{2}\pi ^{2}=E
Swap sides so that all variable terms are on the left hand side.
\pi ^{2}m_{2}=E
The equation is in standard form.
\frac{\pi ^{2}m_{2}}{\pi ^{2}}=\frac{E}{\pi ^{2}}
Divide both sides by \pi ^{2}.
m_{2}=\frac{E}{\pi ^{2}}
Dividing by \pi ^{2} undoes the multiplication by \pi ^{2}.
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