$\int\frac{-2}{\sqrt{4x-x^2}}dx$
$4x^2\cdot27x^3$
$\frac{2\left(8n^4-m^4\right)}{2n+2m}$
$5x+y=2\:$
$\frac{x^2}{\left(x^2+x+2\right)}$
$-8.1\:+\:-3.2\:+\:-0.5\:+\:0.6\:+\:1.8\:+\:2.5\:+\:5.8$
$4x-2x>4x+x+1$
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