Tom's puzzle

Tom Rodgers #1 #2 snail-mailed me a rebus-like cryptogram involving 5 digit numbers, plus and minus signs, and short sequences of letters.

I solved it and snail-mailed it back to him with the answer, but forgot to take a photo of the puzzle, first.

Anyway, I did just send him a one line email

95501 !

which is enough for you to guess the puzzle encoding I'll bet.

Added later: In checking whether Tom's forwarded puzzle might not be on the web, I found this G4G7 article that I hadn't seen before. In particular, it has the following:

By day four, even Princeton's John Conway—typically the earliest to rise and last to bed—was lamenting the overload. "There's infinitely much to know," he said. "You simply can't know it all, despite the fact that that is my aim."

NB

Seussism source?

"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." (Dr. Seuss)

Is that in a Seuss book, or is it something he just said, sometime?

Maybe it's in "Oh, the places you'll go" ? (probably not)