diff --git a/education/math/MATH1210 (calc 1)/Integrals.md b/education/math/MATH1210 (calc 1)/Integrals.md
index c2827d5..b4da706 100644
--- a/education/math/MATH1210 (calc 1)/Integrals.md	
+++ b/education/math/MATH1210 (calc 1)/Integrals.md	
@@ -89,4 +89,5 @@ $$\int_a^b f(x) dx = F(b) - F(a)$$
 2. Let $f$ be a continuous function on $[a, b]$ and let $x$ be a point in $[a, b]$.
 $$ F(x) = \int_a^x f(t)dt \Rightarrow F'(x) = f(x) $$
 $$ \dfrac{d}{dx} \int_a^{g(x)} f(t) dt = f(g(x)) * g'(x)* $$
-$$ \dfrac{d}{dx} \int_2^{7x} \cos(t^2) dt = $$
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+$$ \dfrac{d}{dx} \int_2^{7x} \cos(t^2) dt = cos((7x)^2) * 7 = 7\cos(49x^2)$$
+$$ \dfrac{d}{dx}\int_0^{\ln{x}}\tan(t) = \tan(\ln(x))*\dfrac{1}{x} $$
\ No newline at end of file