$\frac{x^3+2-4}{x^2+2x-3}$

$5k+2k$

$\frac{dy}{dx}=2y\left(x\right)-3$

$\left(3^2\right)\left(2\right)\left(-1\right)\left(-1\right)$

$14f\:+\:16\:+\:8f\:=\:-4\:+\:17f$

$\frac{\tan\left(x\right)+\sin\left(x\right)\sec\left(x\right)}{\csc\left(x\right)\tan\left(x\right)}$

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