$\tan^2x+2\sec^2x$
$25g^2-36$
$x^2-ikx-2ixy+y^2$
$\frac{dy}{dx}=\frac{3x+1}{3}$
$\int\frac{4x-x^2-1}{\left(x+2\right)\left(x^2+9\right)}dx$
$3\left(5y\:-\:6\right)\:+\:2\left(7\:-\:3y\right)\:$
$\left(5x^3-2y^2\right)\left(6y^2+5x^3\right)$
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