Yeah, I know, people just start talking and the subject gets a little out - of - way.
Using only two 2s and any mathematical symbols, make 5. NO TRICKS

Nearly all subjects, answering your question. There was no way for me toshow that horsey lewy's goals, he's got me blocked, so i did on this forum. Wasn't right regarding the person who opened this forum. *unfollowing.

2 + 2 is four. now you just need a one using just mathematical symbols, no integers. e, pi and i are all math symbols. As you know from the Euler identity, e raised to the power of i x pi equals minus one, so the answer is 2 + 2 - (e raised to the power of i x pi).

2+2+(p/p)
Only two 2s used. +, p, ( ) and = are all math symbols. p is supposed to be Pi but cannot enter the proper math symbol for it. PI has an infinite value; however, anything divided by itself, by definition, is 1. Therefore, 2+2+(p/p) equates to 4+1=5.

(Squareroot .2)^-2 is right!!! NICE Gambit!
Square root of .2 squaredvis just .2, but to the NEGATIVE 2 power, it is 1 OVER .2, which is 2

@VicountVonJames: Your major problem with the answer you gave in #104 isn't that your "1" is illegal, it's that the expression you provided equals SIX, not five. Put a dunce cap on your catvatar.
@Jonathan-Harker: Pi is the sum of the infinite number of terms in the Taylor series 4 - 4/3 + 4/5 - 4/7 + 4/9...etc., and it can be expressed in a simple sigma format, but I don't know how to type a sigma with the stuff you need on the top and bottom into a chatbox.
Im just wondering, how do threads always change-out-of subjects like this?