$\int\frac{\cos ax}{1-\senax}dx$
$4s^2+28s+49$
$-ih\left[-aksin\left(kx\right)+iakcos\left(kx\right)\right]$
$\left(-9\:-1\right):2$
$-44ax\:+121a^2+4x^2$
$\log_a\left(\frac{\sqrt{x^2+y}}{a^3}\right)$
$8.3p^2+4.8p$
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