$\int r\cos\left(\theta\right)dr$
$\lim_{x\to\infty}\:\frac{2^{2x}\cdot2}{4^x-1}$
$\left(14x-5y\right)^2$
$\frac{10x^520x^2y^2}{5x^3y^3}$
$\left(x-2.5\right)^2$
$3\cos^2\left(2x\right)+2\cos\left(2x\right)=0$
$\frac{36m^4n^3}{n}$
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