WIP.
diff --git a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMath.scala b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMath.scala
index 511c3a9..bcd33df 100644
--- a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMath.scala
+++ b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMath.scala
@@ -80,11 +80,11 @@
             "log(8) != log(9)",
             "log10(8) != log10(9)",
             "log1p(8) != log1p(9)",
-            "pow(2, 2) -4 < 0.001",
-            "pow(2.0, 2.0) -4 < 0.001",
-            "pow(2, 2.0) -4 < 0.001",
-            "pow(2.0, 2) -4 < 0.001",
-            "pow(2.0, 2) -4 < 0.001",
+            "pow(2, 2) - 4 < 0.001",
+            "pow(2.0, 2.0) - 4 < 0.001",
+            "pow(2, 2.0) - 4 < 0.001",
+            "pow(2.0, 2) - 4 < 0.001",
+            "pow(2.0, 2) - 4 < 0.001",
             "rand() < 1",
             "pi() - 3.142 < 0.01",
             "euler() - 2.718 < 0.01",