how come its so hard to put an index on a square root on your site?

huh?

 

$$\sqrt[4]{625}$$

 

input                  sqrt(625,4)

output               $${\sqrt[{{\mathtt{{\mathtt{4}}}}}]{{\mathtt{625}}}} = {\mathtt{5}}$$

 

or

input                    625^(1/4)

output                  $${{\mathtt{625}}}^{\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}\right)} = {\mathtt{5}}$$