$\sin\left(x+30\right)=\sin\left(2\right)x$
$\left(-6\right)\left(-3\right)\left(-1\right)$
$\:x^4\cdot\:x^7\cdot2x$
$9^9=x^9$
$\frac{3x+9x^2}{3x}$
$\lim_{x\to0}\left(\frac{4-4\cos\theta}{\sin3\theta}\right)$
$\int\frac{3}{\left(x+3\right)\sqrt{x^2+6x-8}}dx$
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