$2x^5-x^3+x+7x^2+3x^4$

$\left(a-6b\right)^2$

$\frac{d}{dx}\left(2e^{\tan\left(x\right)}\right)$

$1,5\cdot\left(\frac{\sin\left(66\right)+\cos\left(66\right)}{tan\left(57\right)}\right)$

$\frac{d}{dx}\sqrt[5]{2-4x}$

$x+2\sqrt{x^2}$

$\lim_{x\to\frac{7\pi i}{2}}\left(e^{tan\left(x\right)}\right)$