$\left(r^2\right)^5$
$\sin\left(3.14\right)$
$\frac{\left(z-\frac{d}{2}\right)}{\sqrt{x^2+\left(z-\frac{d}{2}\right)^2}}$
$x^2=8-2x$
$\frac{x^{-3}\cdot y^{-1}\cdot z^{-1}}{2x^{-3}\cdot y^{-1}}^2$
$5x^2y^4z^2-3xy+6z+2;\:x=2;z=-1y=3$
$x2+13x+40=0$
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