$\frac{e}{26}\cdot26$
$\frac{5a^{-4}b^7}{15a^2b^{-4}}$
$\lim_{n\to\infty}\left(\frac{sin\:n\pi}{n}\right)$
$8x^2-6x\:-\:9$
$\lim_{x\to\infty}\left(\frac{1-2x^2+4x}{3}\right)$
$t\sqrt{2t^2+16}$
$\left(x\:+\:11\right)^2$
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