$y^2+2cx+c^2=0$
$\frac{6}{x}+\frac{7}{5x^2}$
$\cos\:^2\left(\theta\:\right)+\cos\:^2\left(\theta\:\right)\cdot\:\cot\:^2\left(\theta\:\right)=\cot\:^2\left(\theta\:\right)$
$\frac{d^2}{dx^2}\left(x\cdot\cos\left(x\right)\right)x^2\sqrt{x}-5x$
$42.\left(-7\right)$
$-\left(-5+6-3-6\right)+3-\left(+5-2+1\right)$
$5.8+2.67$
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