$-\frac{18}{\left(-6+7\right)-\left[\frac{\left(-7+10-24\right)}{\left(-11+4\right)}\right]}$
$\int\sin\left(20a\right)\sec^2\left(\cos\left(20a\right)\right)da$
$\left(1\right)\left(-3\right)^3$
$4x+2x+x$
$4567+\left(-9089\right)+457+346$
$\frac{3x}{6x-10}+\frac{5}{6x-10}$
$\cos\left(x\right)\left(\tan\left(x\right)-\sec\left(-x\right)\right)$
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