$2a-\left(a-3\right)+4\left(-a-2\right)+a+5$
$x^2-4\ge2x+4$
$\frac{d}{dx}y\:=\:t^{\sqrt{3t}}$
$\int_0^{+\infty}\left(\frac{4}{e^{2x}}\right)dx$
$7sin^2+8cos^2\left(x\right)$
$4x^2-8x+4=0$
$\int\left(x\cdot\cos\left(3x^2+2\right)\right)dx$
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