Expression node - simple scripts as a node

A new node that would allow input N values and name them, then use them as variables in the expression below. From my experience Math nodes, within the node tree, make a lot of "noise" that very often make the tree enormous even for simple task. A node as such would greatly help to contain all those math operations.

Currently you could try a driver in the Value node, but getting all those inputs via python is a drag.

*Optionally it could also have Boolean output to ease the selections