Changing parenthesis size for typography

Question

I am using Mathematica to layout some mathematical formulas for publication. The guidelines specify that in case of nested parentheses the encompassing ones need to be bigger than the inner ones. So is there a way to make parentheses bigger easily? Below is an example of what I want. It is made by inserting an invisible column at the beginning of the grouping, but that creates a ugly gap in the formula.

Answer 1

It is a bit messy but you can manually fix this by highlighting the stuff to the left of the parenthesis, and the left hand parenthesis, and nudge the stuff to the right

The result will look like this:

Answer 2

There is the way to insert a column consisting of three elements into the parantheses, and make the first and the third of them white (and thus, invisible). Namely,

1. Type (, type Ctrl+Enter, type Ctrl+Space, once more type Ctrl+Space, type ). You get a 3-element column enclosed by the parantheses.

2. Make the first and third elements white.

3. Mark the first element, go to Menu/Format/Font and choose a smaller font size, say, 6 pts. Make the same with the third column element.

4. Type your expression into the second element.

The snapshot one may see below. To my taste this method is not really satisfactory, since the outer parantheses are too large