=\=/2 [ISO]+Expr1 =\= +Expr2
Succeeds if the results of evaluating Expr1 and Expr2 are not equal.
Evaluates Expr1 and Expr2 as arithmetic expressions and compares the results.
Arithmetic errors (see ref-ari-exc).
| ?- 7 =\= 14/2.
no
| ?- 7 =\= 15/2.
yes