$m^4-2m^2$
$x-3<5$
$\frac{y^3}{3}=\frac{x^2}{2}+c$
$\frac{d}{dx}4\ln\left(\frac{5}{x}\right)$
$16x^4y^2-25w^8z^4$
$\lim_{x\to0}\left|\frac{4f^2+3f+2}{f^2+2f-6}\right|^3$
$\cos a\left(1+2\cos a\right)-\cos3a-\cos a=\cos^2a-\sin^2$
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