$\left(2x+y-7\right)dx+\left(x+2y-8\right)dy=0$
$6\sqrt{5}+8\sqrt{5}+7\sqrt{5}$
$\frac{x}{\left(x^2-1\right)\left(x^2+1\right)}$
$\frac{\left(-2\sqrt[4]{\frac{\pi}{2}}\right)}{\frac{\pi}{2}}$
$\tan\left(\arccos\left(x\right)\right)$
$\frac{16x^4y}{8x^7y^6}$
$-3x\:-\:8\:+\:-9\:+\:-5x\:+\:-4x$
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