$\int_{-\infty}^0\frac{3x}{x+x^3}dx$
$32^3f$
$\frac{d}{dx}x^4-3x^2y+3y^2=7$
$\cos\left(\frac{3\pi}{2}-x\right)=-\sin x$
$27x^3-125y^3$
$a^2\:-\:1.2a\:+\:0.36\:$
$\frac{y^6n^3+m^3}{y^2n+mx}$
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