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diff --git a/FSF-2020/calculus/intro-to-calculus/riemannintegrals/README.md b/FSF-2020/calculus/intro-to-calculus/riemannintegrals/README.md
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+rierect1.gif
+![rierect1](https://user-images.githubusercontent.com/61246381/87141790-3ad90800-c2c1-11ea-86e4-af05cb93fa2d.gif)
+
+
+rierect2.gif
+![rierect2](https://user-images.githubusercontent.com/61246381/87141870-5ba15d80-c2c1-11ea-9307-40acc2884d77.gif)
+
+
+rierect3.gif
+![rierect3](https://user-images.githubusercontent.com/61246381/87141949-6e1b9700-c2c1-11ea-9433-4f6be752aa55.gif)
+
+
+RiemannRectanglesAnimation.
+![RiemannRectanglesAnimation](https://user-images.githubusercontent.com/61246381/87142531-4a0c8580-c2c2-11ea-8f5e-9e854eae6eec.gif)
+
+
+mimi.gif
+![mimi](https://user-images.githubusercontent.com/61246381/87142127-b3d85f80-c2c1-11ea-864e-627e41d87ea2.gif)