$\left(1+\cot\left(a\right)\right)\cdot\left(1-\cot\left(a\right)\right)+\csc^2\left(a\right)=2$

$10v-5$

$\lim_{x\to0}\left(\frac{e^{5t}-1}{\sin\left(t\right)}\right)$

$x+14=3$

$\left(6x-8y^2\right)$

$\left(5x-1\right)\left(5x+1\right)$

$\int_0^{\frac{\pi}{2}}\left(\tan\left(\theta\right)\right)^2d\theta\:$