diff --git a/education/math/MATH1210 (calc 1)/Integrals.md b/education/math/MATH1210 (calc 1)/Integrals.md
index d799470..4187515 100644
--- a/education/math/MATH1210 (calc 1)/Integrals.md	
+++ b/education/math/MATH1210 (calc 1)/Integrals.md	
@@ -213,4 +213,6 @@ $$ \lim_{n \to \infty} \sum_{i = 1}^n (f(x_i)-g(x_i)\cdot \Delta x)$$
 - $\Delta x$ is the width of each sub-interval.
 
 This sum can also be described as:
-$$ = \int_a^b(f(x)-g(x))dx $$
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+$$ = \int_a^b(f(x)-g(x))dx $$
+
+Where the two lines intersect each other, you'll need to split the solution into a sum of integrals to ensure that $f(x) \ge g(x)$, by swapping the two.
\ No newline at end of file