Friday, September 8, 2017 11:06 AM (about 2 years ago)

$$\frac {1+a}{4+b}$$

$$ \begin{bmatrix} 1 & x & x^2 \ 1 & y & y^2 \ 1 & z & z^2 \ \end{bmatrix} $$

$$ \begin{bmatrix} 1 & x & x^2 \ 1 & y & y^2 \ 1 & z & z^2 \ \end{bmatrix} $$

$\sqrt[4]{\frac xy}$