$\cot x=\frac{\cos x}{\sin x}$
$x^2+400x+0.02$
$\int in^2\:z\:dz$
$4x+22$
$\lim_{x\to a}\left(\frac{\left(x^2-\left(a+1\right)+a\right)}{\left(x^2-a^2\right)}\right)$
$12x^2-20x+5\le0$
$\int\cot\left(x\right)\cdot\sqrt{\ln\left(\sin\left(x\right)\right)}$
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