diff --git a/sumTest.js b/sumTest.js
new file mode 100644
index 0000000..8cf9235
--- /dev/null
+++ b/sumTest.js
@@ -0,0 +1,16 @@
+const sum1 = function (prop) {
+    let result = prop;
+    const summa = prop => {
+        if (prop === undefined) {
+            prop = 0
+        }
+        result += prop;
+        return summa
+    };
+    summa.toString = () => result;
+    return summa;
+};
+
+console.log(sum1(1)(2)(3)()); // 6
+console.log(sum1(1)(2)(3)(4) + 1); // 11
+console.log(sum1(1)(2)(3)(4)(5) + 1); // 16