$100-8\cdot23+6$

$\lim_{x\to3}\frac{\left(x-5\right)\left(x-1\right)}{x-3}$

$\left(\tan\left(7x^2\right)+\sin\left(8x\right)^2\right)\cdot\frac{1}{x^2}$

$\int\:\frac{3x+1}{x^2+2x+5}\:dx$

$\cot\left(a\right)\cdot\csc\left(a\right)$

$\left(2^{-4}\right)^{-3}$

$\left(-50+x\right)^2$