PS,
PiFast43 is freely available at,

http://numbers.computation.free.fr/Constants/PiProgram/pifast.html

What’s the simplest way to solve an algebraic equation in the complex domain?

For example,

I*(a+3*b)+2*b+5*a = 3+2*I

where a and b are real numbers.

How can I know the solution is correct??

Here is the code:

s := solve(sin(x^2) = 1/2);
test := subs(x = s[1], sin(x^2) = 1/2);

 “Error, too many levels of recursion” ,but there’s just a single expression.

How can this happen?

The help documents read，

“

 The function unames returns an expression sequence consisting of all the active names in the current Maple session which are ``unassigned names''.

“

But what unames() returns is obviously not the contents one expects: