$2r^2+10r=28$
$25x^2-70x+000$
$-16t^2+48t+448=-16\left(t-7\right)\left(t+4\right)$
$39^2$
$\lim_{x\to0}\left(1+\frac{8}{x}\right)^{\left(\frac{x}{2}\right)}$
$\log\left(\frac{100x^4\sqrt[3]{8-x}}{7\left(x+6\right)^2}\right)$
$\int_{2.5}^{7.5}784\:x\:dx$
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