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Recently Referred Formulae

\frac{d\omega}{dt}=-(g/L)\sin{\theta}\\ \frac{d\theta}{dt}=\omega\\ \frac{d\omega}{dt}=\alpha\\
T[y]=\int^{400km}_{0km}\sqrt{\frac{1+y'^2}{2gy}}dx\\ =\int^{2\pi}_{0}\sqrt{\frac{1+(\frac{dy}{d\theta}/\frac{dx}{d\theta})^2}{2gy(\theta)}}\frac{dx}{d\theta}d\theta\\ =\sqrt{\frac{A}{g}}2\pi
T[y]=\int^{400km}_{0}\sqrt{\frac{1+y'^2}{2gy}}dx\\ =\int^{2\pi}_{0}\sqrt{\frac{1+(\frac{dy}{d\theta}/\frac{dx}{d\theta})}{2gy(\theta)}}\frac{dx}{d\theta}d\theta\\ =\sqrt{\frac{A}{g}}2\pi
Example of how to make line-breaks in a tabular cell
\begin{tabular}{|ccc|} A & \shortstack{B1 \\ B2 \\ B3} & C \end{tabular}
x=A(\theta-\sin{\theta})\\ y=A(1-\cos{\theta})