$\lim_{x\to-\pi}\left(\frac{8\cos\left(x\right)+8}{\left(x+\pi\right)^2}\right)$
$x^2\cdot\frac{\sqrt{\frac{y^2}{x}}}{z}$
$6sin\left(\frac{\pi}{2}x\right)=5$
$\frac{x^n-1}{x^3-1}$
$4x+4x+3x+4x+3x$
$5.50-3.50-2.75+1.50$
$x^2+13x+36$
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