$\int r\cos\left(\theta\right)dr$
$\int_3^3\left(x\sqrt{\left(x^2-4\right)}\right)dx$
$1x^2-0,00000000048x+0,000000000176$
$x^4+6x^3+5x^2-24x-36$
$\frac{x-4xy}{x}$
$\:\left(4m-3n\right)\left(2n+4m\right)$
$x^2\frac{dy}{dx}=-y^2$
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