Effective assignment take much longer to solve

[iils-hwellmann]

Describe the bug

Equations that are effectively simple assignment can take much longer to 'solve'.
I.e. equations for which the left- or right-hand side is a variable and the other side is a algebraic expression without a variable, run magnitudes longer if they are evaluated in the context of the Solve operation.

To Reproduce

Example input Symja input expression:

>> Solve({var0==ArcCos(Sqrt(700000^2+2*700000*6378000)/((700000+6378000)*Cos(-8258413328561117/18014398509481984)))/(884279719003555/281474976710656)},{var0})

Or if one solves it from Java code:

String eq = "Solve({var0==ArcCos(Sqrt(700000^2+2*700000*6378000)/((700000+6378000)*Cos(-8258413328561117/18014398509481984)))/(884279719003555/281474976710656)},{var0})";
IExpr solution = new ExprEvaluator().eval(eq);
System.out.println(solution);

Takes multiple second to evaluate and to print a result with MathEclipse 3.1.1.

Expected behavior

Solves almost instantaneously as effectively only the RHS has to be calculated, like it does with MathEclipse 3.0.0.

Screenshots
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Java

• Version [e.g. Java 25]
• OS: all