$cot\left(2x\right)=\frac{1}{2}\cdot secx\cdot cscx-tanx$
$\left(x-\frac{1}{2}a\right)^2$
$\frac{4592}{-82}$
$\frac{dy}{dx}=-2y+4e^x$
$\left(\frac{1}{7}\right)^{\infty}$
$x^6\cdot x^{-4}$
$\int\frac{x^2+1}{\left(x+3\right)^2}dx$
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