I will add that, but after integrating @barreeeiroo Mathematical Engine. His math engine, will allow to do more powerful math calculations! You will be able to use cos, tan, sin, calculations with more than 2 different numbers (200 - 100 + 3 / 0.35 x 6) and so on! Also, if someone can make an extension which converts image to Base64 string that would be amazing! If you can make it, that would be cool. As it will make this app to be fast as PhotoMath.