This answer addresses the possible way to typeset a bigger integral sign, but one has to choose the right size of the symbol that better fits the situation.
My question is: why can't we resize the \int
symbol as we usually do for common delimiters ()
, []
and \{\}
?
By writing
\left\{ \left[ \left( stuff \right) \right] \right\}
delimiters are automatically sized with respect to stuff
and the preceding/subsequent delimiter.
Why can't we write
\left \int \left\{ \left[ \left( stuff \right) \right] \right\} \right.
so that the \int
symbol is automatically sized, too?