$3\tan^2x\:-\:\sec^2x-5=0$
$-35\cdot10$
$\left(\sqrt{z}-5\right)^2$
$\left(10x+y\right)\left(10x-y\right)$
$x^2+4x=5$
$2\cos\left(y\right)-\sqrt{2}=0$
$\lim_{x\to\infty}\left(\frac{e^x-x-1}{9x^2}\right)$
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