It is a step-by-step procedure for carrying out some mathematical process.
A letter in math can stand for any number
Math is an abbreviation of mathematics: it is not an acronym. So the h does not stand for anything!
It depends what type of math. If you're finding answers to addition/subtraction/multiplication/division use your favorite algorithim. For others, follow the steps. Acctually IDK I'm not a genius like my best friend Melissa, but obviously it's not hard!
You use an algorithim.
the letter L can stand for a variable.