$\cos\left(x\right)\left(\cos\left(x\right)-\sec\left(x\right)\right)-\cot\left(x\right)$

$\left(+56\right)-\left(-65\right)+\left(+69\right)-\left(+58\right)+\left(+72\right)+\left(-83\right)-\left(+52\right)+\left(-76\right)$

$2^n+2^n+2^n+2^n$

$\frac{\pi}{4}=arctan\:x\:$

$4v+17+2v-14$

$\:13\left(4\right)+7\left(4\right)\left(12\right)-\left(3\right)^2$

$\frac{3x^3-12^2-9x+1}{x-5}$