$\frac{\left(22-7x\right)}{2}+5<9$
$6\left(-3\right)^4m^4$
$\left(\sqrt{7}+\sqrt{5}\right)\left(\sqrt{7}-\sqrt{5}\right)+\left(\sqrt{2}+1\right)\left(\sqrt{2}-1\right)$
$4a^2+37a+9$
$\sqrt{1+\frac{\cos\left(x\right)^2}{\sin\left(x\right)^2}}$
$\left(2x+5c^2\right)\left(2x-5c^2\right)$
$4.\:-13.-5\:$
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