Continually edit current calculation.
Nested parentheses: (((7 + 3) / 2) + 5) / 2
Exponents: 3^2 and roots: 9^(1/2)
Implicit multiplication with parentheses: (2+3)(4-5)
Fractions (add an "f"): f 4 1/4 + 3/4
Remainders (add an "f"): f 500/6 = 83 1/3