$\lim_{x\to16}\left(\frac{t^{\frac{1}{4}}-2}{t-16}\right)$

$\:0.4\left(-3.6-0.5x\right)+0.8\left(1.9+x\right)$

$y=\ln\left(-x^2+6x\right)$

$\int_0^{-1}\left(3x^4-3x^2\right)\left(12x^3-6x\right)dx$

$\frac{dy}{dx}-2xy=x-x^3$

$-\left(5\right)-\left(-5\right)$

$\frac{\left(cos^2x\:-\:2cosx\:+\:1\right)}{sin^2x}$