Mathematical operations can be nested, and so symbols can contain expressions with symbols. Many symbols expand to match the size of their contents; note, for instance, the variable size of the square root symbol and the conjugation bar:
Normally we will also want our parentheses to scale depending on their contents, but this will not happen if we type them with the keyboard, since this will result in “normal” characters that do not scale, just as an “a” does not scale. If we want to use parentheses that do scale, we will have to use the , , , and icons in the General tab. By the way, this ensures that all couples of parenthesis are well closed and nested.
Let us see one example, by writing
|Write the base of the power|
|Click on the icon|
|Select all of the parenthesis|
|Click on the icon in the General tab|
|Click on the exponent and type 3|
|If instead of using the icon we had used the ( and ) keys, the result would have been this:|
If your formulae look a little bit odd, remember that, when several symbols are nested, there can be subtle differences depending on the exact order of nesting. For instance, consider and ; the first is “initialized”, while the second is “vectorized”, so that the vector arrow extends over 0 only in the second case.