Define some rules for a function, and press F to find a function corresponding ! Priorities : First () , then ! , then √ s c t ⌊ ⌈ , then ^ , then * / , then + -. s means sin, c is cos and t is tan. ⌈ is ceiling and ⌊ is floor. There sould be another symbol at the end but operations have to be a single character long. Factorial (!) doesn't work with decimal numbers and will approximate them. Factorial (!) and exponents (^) do not work with negative numbers.
