mathematical notation

NOUN
21 LETTERS · STARTS WITH M

mathematical notation is a valid 21-letter word worth 29 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3A1T1H4E1M3A1T1I1C3A1L1N1O1T1A1T1I1O1N1
3 + 1 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 3 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does mathematical notation mean?