diff --git a/js/mathExpression.js b/js/mathExpression.js
new file mode 100644
index 0000000..b61693c
--- /dev/null
+++ b/js/mathExpression.js
@@ -0,0 +1,14 @@
+import { app } from "/scripts/app.js";
+import { ComfyWidgets } from "/scripts/widgets.js";
+
+app.registerExtension({
+	name: "pysssss.MathExpression",
+	init() {
+		const STRING = ComfyWidgets.STRING;
+		ComfyWidgets.STRING = function (node, inputName, inputData) {
+			const r = STRING.apply(this, arguments);
+			r.widget.dynamicPrompts = inputData?.[1].dynamicPrompts;
+			return r;
+		};
+	},
+});