# Huge \not and Feynman \slashed for bigger equations or symbols

We can write

$\not{a}$

$\slashed{a}$


under

\usepackage{amsmath}


for the following symbol:

What if I have a larger equation like:

$\int a b c d e f g dx$


How do we write a bigger \not for it? And bigger \slashed?

$\not{\int a b c d e f g dx}$

• In addition to my answer, I would add that \not a is not proper usage. The \not macro expects to work on an object of category \mathrel, such as \not=. For use with other categories, you should wrap them in a \mathrel, such as \not\mathrel{B}, or more precisely, A\mathord{\not\mathrel{B}}C. Apr 14 '17 at 18:26

Perhaps you are looking for the cancel package.
\documentclass{article}
$\cancel{\int a b c d e f g dx}$