$\int x\left(2x+4\right)dx$
$\left(7+4a\right)\left(2-3a\right)$
$\lim_{n\to\infty}\sqrt{\frac{2n}{n+1}}$
$\left(x-\left(\frac{x^2}{60}\right)\right)$
$25x^2+60xyz+36y^2\:z^2$
$cos\left(x-50^{\circ}\right)=0.76$
$\left(\left(\frac{x^4}{y^2}\right)\right)^{-3}$
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