The equation parser-evaluator for COMPLEX number math expressions with parse-tree builder and user-friendly interface for parsing and evaluation a run-time defined math complex number expression.
The math expressions is represented as string in a function style
F(x1, x2,..., xn) =f(x1, x2,..., xn)
, where
F(x1, x2,..., xn) - declares number and names of the variables;
f(x1, x2,..., xn) - math expression may contain:
variables x1, x2,..., xn and constants, which can be complex numbers (for designation image part of the complex numbers use 'i' or 'j' letter),
operators: + - * / ^ @,
functions abs, arg, conj, cos, cosh, exp, imag, log, log10, norm, real, sin, sinh, sqrt, tan, tanh,
constants e= 2.71828182845904 and pi= 3.14159265358979, and
user defined functions and constants.
For example:
F(x, y) = 3i*x^2+y^2j+e/4i,
F(x1, x2, y) = (x1-sin(x2@y))/y,
F()=5+6i+pi.

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