$-3=z+4$

$\left(x+y+z=6\right)$

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

$\int\left(10\cdot e^{\left(-30t\right)}\cdot sin\left(40t\right)\right)dt$

$\lim_{n\to\infty}\left(\frac{\sqrt{n}}{\sqrt{n}+1}\right)$

$x\left(y-3\right)dy\:-\:4ydx=0$

$\frac{-e^{-2x}sin\left(2x\right)-e^{-2x}cos\left(2x\right)}{4}$