$\frac{20x^4+15x^2}{5x^2}$
$\arctan\left(\frac{29}{29}\right)$
$-\left(8-4\right)-\left[3-\left(4-6\right)-2\right]$
$2xy\frac{dy}{dx}=y^2+1,\:y\left(2\right)=2$
$64-b^3$
$6x^2-15x+9$
$\left(6a+96\right)^2$
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