added another check

diff --git a/check/exam_normalization.cpp b/check/exam_normalization.cpp
index c9ceb18ca8400943314e1a06414a986e39f9884b..b42a2c7fd5d3866e6a8af3c9be8b8798c186d738 100644 (file)
--- a/check/exam_normalization.cpp
+++ b/check/exam_normalization.cpp
@@ -203,6 +203,7 @@ static unsigned exam_content()
        result += check_content(5*x-15, x, 5, 5, x-3);
        result += check_content(5*x*y-15*y*y, x, 5, 5*y, x-3*y);
        result += check_content(-15*x/2+ex(25)/3, x, ex(5)/6, ex(5)/6, 9*x-10);
+       result += check_content(-x*y, x, 1, y, x);
 
        return result;
 }