Built using GMP, MPIR ad MPFR libraries allowing millions of digits precision. Currently supported functions: abs, acos, acosh, asin, asinh, atan, atanh, cos, cosh, cot, cot, coth, csc, csch, exp, ln, log, log10, log2, pi, sec, sech, sin, sinh, sqrt, tan, tanh. Example: (4 * atan(x / 5) - atan(y / 239)) * 4 It has X, Y, Z input boxes in order to substitute all X, Y and Z's found, if needed. They accept both formulas and numbers. User can specify Calc precision and Print precision, nearly unlimited apart from longer processing times. ^ is power (2 ^ 3) % is modulus (16 % 3) ! is factorial (5!).