There was a time when I hated Calculus, back at School.
Always wondered about who found it 
When Newton and Leibniz first published their results, there was great controversy over which mathematician (and therefore which country) deserved credit. Newton derived his results first, but Leibniz published first. Newton claimed Leibniz stole ideas from his unpublished notes, which Newton had shared with a few members of the Royal Society. This controversy divided English-speaking mathematicians from continental mathematicians for many years, to the detriment of English mathematics. A careful examination of the papers of Leibniz and Newton shows that they arrived at their results independently, with Leibniz starting first with integration and Newton with differentiation. Today, both Newton and Leibniz are given credit for developing calculus independently. It is Leibniz, however, who gave the new discipline its name. Newton called his calculus “the science of fluxions”.
Imagine calling it fluxions 
Now, I came across this wonderful comic site : xkcd
By the way if ur wondering why Newton and Leibniz are looking like this … here’s the reason
This is Newton 
And here is his derivation 
So much about calculus eh 
