$\lim_{x\to0}\left(\frac{sin\left(t\right)-1}{t^3}\right)$

$\int\frac{x^2}{\sqrt{\left(4-x^2\right)}}\:dx$

$\lim_{x\to0}\left(\frac{\sqrt{16+2x}-4-\frac{x}{4}}{x^3-x^2}\right)$

$y'-3y=e$

$\int\sqrt{1-\cos\left(4x\right)}dx$

$xsen\left(\frac{\sqrt{15}}{4}\left(0\right)\right)$

$30t\:+\left(-5t\right)+9t-17t-\left(-8t\right)$