$7x-11>4x+25$
$\left(x+2y-3\right)\left(x+5+2y\right)$
$\sqrt{3}\cot\left(\frac{5\pi}{7}\right)x=3$
$\frac{\left(x+1\right)\left(x-1\right)}{2}$
$\frac{1-\sin x^2}{\cos x^2}$
$3x+6y-6z=9$
$-6\left(1\right)-5$
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