Run mathematica commands in emacs

I would like the following feature: When writing a document in emacs (say, a LaTeX paper), I can write the original expression in a comment line, then execute and get the answer. The idea is to send a string from emacs to a shell script, which runs Mathematica kernel

Here is the realisation:

Cosmic inflation is a form of life?

Cosmic inflation (more precisely, the Hubble patch which is undergoing inflation) is a form of life? Clearly not in common sense. However, according to Wikipedia: Life is a characteristic of organisms that exhibit all or most of the following 7 phenomena: