$\left(x^2\:-3x\right)^2$
$\frac{dy}{dx}=3y-x^2$
$x^2-1.8x+0.81$
$\lim_{x\to2}\:\frac{y^2-4}{y^3-8}$
$4x^2+32x+28$
$\lim_{x\to\infty}\left(\frac{\sin\left(2x\right)}{x}\right)$
$\left(\cos\left(b\right)+\cos\left(2a\right)\right)\sin\left(b\right)$
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