$7x^2-20x-27$
$16^7$
$\lim_{x\to\infty}\left(\frac{3ln\left(x\right)}{e^x}\right)$
$\left(x^4+\frac{\sqrt[3]{6}}{x^2}\right)^{2n+1}$
$4x^2+12xy+4y^2$
$2x^4+5x^3-x-6$
$2\cot\left(a\right)\cot\left(2a\right)=\cot^2\left(a\right)-1$
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