$\arctan1.5$

$\left(z+4\right)^2$

$\left(2\right)^3-3\left(-2\right)^2-4\left(-4\right)-30$

$\frac{sen\left(x+y\right)}{cos\left(x+y\right)}$

$\frac{d}{dx}\left(3x^2sen\left(z\right)+2yz=4x+y^2\right)$

$\lim_{c\to1}\left(\frac{x\left(c^n-1\right)}{c-1}\right)$

$-2x-x^2+1$