$\int\frac{t^4+t^2+1}{\left(t^2+1\right)\left(t^2+4\right)^2}dx$

$\int\left(x^2\sqrt{\left(2x^3+9\right)}\right)dx$

$\lim_{x\to2}\left(\frac{x^3-x^2-x-2}{x^2-5x+6}\right)$

$\frac{d}{dx}\left(6q^2+40+\frac{1000}{q}\right)$

$3x+5\le4x-1$

$\frac{d}{dx}\left(-0.25x^3+100x\right)$

$2\cdot\left(-3-5\right)-\left|2-3\cdot\left(4-1\right)-\left(-3\right)\right|+1$