$11a^2-12a+10-6a^2+2a^2-5a+13$
$\frac{2n^2}{n^{-2}n^3}$
$\left(x^3+3\right)\left(x^3-2\right)$
$cos\left(x-\frac{5\pi}{4}\right)=-\frac{\sqrt{2}}{2}\left(cosx+sinx\right)$
$\left(-5-6\right)-\left(2-3\right)$
$\tan\left(45+x\right)=3$
$\left(8a\:-\:2\right)\:\left(7a\:+\:12\right)$
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