$\frac{\sec^2a-1}{\tan a\:}=\tan a$
$10x-3y=36$
$8.16+2.25+15.321$
$64m^2-81$
$5^1$
$x\frac{dy}{dx}=\left(4x^3-7\right)tan\left(y\right)$
$2\cdot5^{x-4}+15=265$
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