$\sqrt[1]{256}$

$2\left(-7z-10\right)$

$\left(x^2-2x+1\right)-\left(x-1\right)$

$\frac{1}{\sin\left(a\right)\cos\left(a\right)}-\frac{1}{\cot\left(a\right)}=\cot\left(a\right)$

$\sqrt{28x^{12}}$

$\frac{\left(\sqrt{2\left(x+h\right)+1^'}-\sqrt{2x+1}\right)^{'\:}}{h}$

$\frac{dy}{dx}=\frac{2x-5y}{2x+4y}$