$x^2+210-5$
$\lim\:_{x\to\:\infty\:}\left(1+\frac{1}{2x}\right)^{2x}$
$\left(5w^{21}x^8y^2\right)^3$
$-4c+2b+8b+3$
$\lim_{x\to0}\left(\frac{x^3-2x}{1-e^{2x}}\right)$
$5a^2+15a+12=a^2-a-4$
$4\left(3x-5\right)\ge7x-12$
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