$2\:\cos\:\left(\frac{\theta}{2}\right)=1$
$\lim_{x\to\infty}\left(\frac{100x}{e^x-1}\right)$
$-0.5x^2-x+4$
$x^2-2x-24=0$
$279.05-103.38$
$\frac{dy}{dx}=\frac{\left(7+13x\right)}{xy^2}$
$\int\left(-10x+1\right)^{\frac{7}{4}}dx$
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