$\frac{\sqrt{1+\cot^2\left(x\right)}}{1-\cos^2\left(x\right)}$
$\int-x.\ln\left(\frac{c}{x}\right)dx$
$2x^{\frac{-1}{3}}$
$\left(7+2\right)\left(5+4\right)$
$\left(2n+g\right)^2$
$\int te^{5t+\pi}dx$
$\int\frac{x}{\left(1+2x\right)\left(1+x^2\right)}dx$
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