$\left(a^3+3b\right)\left(a^3-3b\right)$
$\lim_{x\to2}cos\left(x\right)$
$2\cos^2x-2\sin^2x=1$
$y\frac{x}{2}+1$
$2x^3+5x-3+2x^3-3x^2+4x$
$\int\frac{\sqrt{3+tan\left(x\right)}}{cos^2\left(x\right)}dx$
$-3\:-\:6x\:<\:-27$
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