no spaces or parenthesis! only characters allowed are 1 2 3 4 5 6 7 8 9 0 . x + - * / ^ √ | % ! s c t < > ~ ≤ ≥ f e L i | is absolute value, % is modulo, ! is factorial, e is euler's, L is log10 s sin, c cos, t tan, ~ multiply by -1, r is alternate sqrt, i is natural log type < , >, ≤, or ≥, then function for inequalities (eg.>x^2) function(s) in function, type "f1" to put f1, "f2" for f2, etc.
