$\left(3x+\frac{1}{2}\right)^3$
$2x^2-x-18<0$
$\frac{\sin a}{\tan2a}=\cos a-\frac{\sin^2a}{\cos a}$
$\frac{dy}{dx}=\frac{\left(x-y\right)}{-\left(x+y\right)}$
$3x^4-10x^3+10x-3$
$\left(+5\right)-\left(+3\right)+\left(+2\right)-\left(+30\right)$
$3cot\:x\:+\:6\:=4$
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