This draws a square root sign around the contents, for example the square root of 1 + x is expressed as:
<SQRT>1 + x</SQRT>
and possibly rendered as: (this is the best I can do with ascii art!)
----------
/ 1 + x
v
The SQRT element has no attributes.
This allows you to specify arbitary roots of an expression. The radix comes first, and is separated from the radicand by the <OF> tag. For example the cube root of 1 + x is expressed as:
<ROOT>3<OF>1 + x</ROOT>
and possibly rendered as:
--------
3/ 1 + x
v
The ROOT element has no attributes.