$\tan^{-1}\sqrt{1}$
$\frac{\cot\left(x\right)-4}{\cot\left(x\right)^2-\cot\left(x\right)-6}$
$y'-4e^{5x-y}=0$
$\cos\left(x\right)+\left(1+\sqrt{2}\right)\cdot\sin\left(x\right)-1=0$
$2x-5-3x+4x+2x-5-x$
$324x^4-y^2z^6$
$\lim_{x\to\infty\:}\left(\frac{4x+4}{4x+9}\right)^{-2x+3}$
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