$\int\frac{30x}{3x+10}dx$
$\frac{\cos}{\sec}\cdot\tan^2=\sin^2$
$\sqrt{81}:\:3\:+\left(-7-7\right):\:2\:+5.\left(-1\right)$
$5\cos^2b-5\sin^2b=5\cos^2b-5$
$16m^2+4m-2$
$-11\left(-22\right)$
$\left(x\:+\:5\right)m\:+\:\left(x\:+\:5\right)n\:$
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