$\lim_{x\to2}\sqrt{x+7}$
$4\sin\left(x\right)-2\csc\left(x\right)=2$
$\left(6x^2-2\right)^2$
$\frac{16a^4-81b^4}{2a-3b}$
$y\ln\left(y\right)\frac{dy}{dx}-\ln\left(y\right)=0$
$\left(f+2\right)\left(2f-3\right)$
$\int_{-40}^{\infty}\frac{49\cos\left(x\right)}{20}dx$
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