$\sin\left(2x\right)=2\cos\left(x\right)$
$y'-2xy=x^3y^{\frac{1}{2}}$
$\left(\frac{a^2}{3}+\frac{2}{5b}\right)\left(\frac{a^2}{3}-\frac{2}{5b}\right)$
$f^2-20f+96$
$18z^4-18+12x-2x^2$
$\frac{x}{5}=3$
$\int\left(5\sqrt{x}+2\right)^{-2}x^{-\frac{1}{2}}dx$
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