Comment 1 for bug 1480662

Spaces is not invalid characters, and our Calculator's engine could handle it.
Our engine is very powerful, and we don't use half od its possibilities, eg matrix, units etc.

In my opinion changing pasted formula will be very frustrating for user, because user never will know what was removed from his formula.

My proposal is to paste everything, without modification, and then user could correct that.

I would like to avoid situation, when user receive wrong result, because we modified formula.