diff --git a/education/math/MATH1210 (calc 1)/Integrals.md b/education/math/MATH1210 (calc 1)/Integrals.md
index 2cf2b0e..3e301c5 100644
--- a/education/math/MATH1210 (calc 1)/Integrals.md	
+++ b/education/math/MATH1210 (calc 1)/Integrals.md	
@@ -58,4 +58,6 @@ $f(x_i)$ is the *height* of each sub-interval, and $\Delta x$ is the change in t
 
 Relevant formula:
 $$ \sum_{i = 1}^n = \dfrac{(n)(n + 1)}{2} $$
-1. $
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+1. $\int_0^1 5x \space dx = \lim_{n \to \infty} \sum_{i=1}^n 5(x_i) * \Delta x$
+2. $= \lim_{n \to \infty} \sum_{i=1}^n 5(\frac{1}{n} \cdot i) \cdot \frac{1}{n}$ 
+3. $
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