$-4^{-1}\cdot4^3$
$\sqrt{\left(3-3\right)}^2+\left(-1-3\right)^2$
$\int\frac{\cos^3\left(\frac{x}{2}\right)}{7}dx$
$5\left(+9+9\right)$
$\frac{dy}{dx}=\frac{x^2+1}{y^2}$
$\int\left(y^3\sqrt{1-y^2}\right)dy$
$e=\left(a\:\:+\:\:\:b\right)^2\:\:-\:\:\:\left(a\:\:-\:\:b\right)^2$
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