diff --git a/education/math/MATH1220 (calc II)/Integration by Parts.md b/education/math/MATH1220 (calc II)/Integration by Parts.md
index 0f706f2..9bcfe2b 100644
--- a/education/math/MATH1220 (calc II)/Integration by Parts.md	
+++ b/education/math/MATH1220 (calc II)/Integration by Parts.md	
@@ -21,4 +21,6 @@ $$\int xe^{2x}dx$$
 	- $u = x$
 	- $du = \frac{d}{dx}(x)= 1dx$ 
 	- $dv = e^{2x}dx$
-	- $v = \frac{1}{2}e^{2x}$ - The antiderivative of $dv$.
\ No newline at end of file
+	- $v = \frac{1}{2}e^{2x}$ - The antiderivative of $dv$.
+2. Looking back at the integration by parts formula, we know that:
+	$$ \int udv = uv - \int v du $$
\ No newline at end of file