$5x^2+20x+17$
$\frac{3a}{5\:}\:\:-\frac{9}{5}$
$3cos\left(x+y\right)\:+\:3cos\left(x-y\right)=6cos\left(x\right)cos\left(y\right)$
$\lim_{x\to0}\left(\frac{\sin\left(3x\right)+\tan\left(5x\right)}{x}\right)$
$-\left(1+7x\right)-6\left(7-x\right)=36$
$-1+2+2+8$
$16\cdot4^3\cdot64$
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