$4x-7<8+9x$
$-5x+15=-10$
$\lim_{x\to0}\left(\frac{\left(e^{-x}-e^{2x}\right)}{x}\right)$
$25x^2-10x^3+15x^3-5x^2$
$\left(c^5\right)^4\:$
$8n-4mn+4n-3mn+5m-24mn-2mn-12mn-m$
$16t^2-32t-256$
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