$\int\frac{\left(2x^2\right)}{x^2+16}dx$
$\left[-10x-5y=0\right]\left[21x-7y=28\right]$
$\frac{d}{dx}x\sqrt{3+2y}+y\sqrt{3-x}$
$a^2+-44a+484$
$16-8x^{2}$
$\cos\left(\arcsin\left(x\right)-\arcsec\left(x\right)\right)$
$-x^2+6x+7$
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