diff --git a/examples/tests.modal b/examples/tests.modal
index 36a12d9..845aa12 100644
--- a/examples/tests.modal
+++ b/examples/tests.modal
@@ -125,6 +125,13 @@ nap tap (inline 1) test
 
 (undefine-me) = (undefine-me) (undefinition 3) test
 
+?(?-) (Arithmetic)
+
+?((?: ?0 ?1 ?2) (?:)) + 1 2 3 = 6 (Arithmetic 1) test
+?((?0 ?: ?1) (?:)) 16 - 8 = 8 (Arithmetic 2) test
+?((?0 ?1 ?:) (?:)) 12 10 * = 120 (Arithmetic 3) test
+
 ?(?-) (Late Test Primitives)
 
-<> (?x = ?y ?n test) (?(?: ?:) (#fail ?n found: ?x expect: ?y\n))
\ No newline at end of file
+<> (?x = ?y ?n test) (?(?: ?:) (#fail ?n found: ?x expect: ?y\n))
+