$1-\tan^2\left(a\right)=2-\sec^2\left(a\right)$
$\left(8x-1\right)^2$
$\frac{7}{2x}-\frac{5}{2}\le\:\frac{2}{3x}\:+\:\frac{1}{3}$
$\left(b^{2x}\right)^{2x}$
$6\left(42-19\right)+10\left(912+24\right)$
$6x-3-x-8$
$\frac{dy}{dx}=\left(x+3\right)\left(y+7\right)$
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