$\frac{\sin^2x-\tan^2x}{\csc^2}$

$-43+67-27+4-7+8+5-5-16+82$

$\frac{\tan\left(10\right)+\tan\left(-70\right)}{1-\tan\left(10\right)\tan\left(-70\right)}$

$-72:6$

$\int_0^{\frac{x}{4}}\frac{sec^2\theta\:}{tan^2\theta\:+1}d\theta\:$

$x^2+15x+36$

$\frac{\left(x^2+5x+5\right)}{\left(x^3+4x^2+5x+2\right)}$