$\left(\sec x\cdot\csc^2x-\sec x\right)$

$\lim_{x\to5}\left(\frac{x^3-125}{x^2-5x+0}\right)$

$\frac{\left(-x^6+5x^4+3x^3-2x+8\right)}{\left(4+x\right)}$

$\left(4x^3+3xy+8y^2\right)\left(4x^3-3xy-8y^2\right)$

$x-4>-1$

$3\int\left(cot^2xcsc^4x\right)dx$

$\sqrt{10\:.\:2\:-8\::\:2}$