From the history of maths
Gottfried Wilhelm Leibniz
His notation for calculus, dy/dx and the long-s integral sign, is the one we still use.
He studied binary arithmetic and built a calculating machine that could multiply.
Christoph Bernhard Francke, Public domain, via Wikimedia Commons
Where you’ll meet Gottfried Wilhelm Leibniz here
CalculusLogic
They turn up beside problems and lessons on these topics.
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Sofia Kovalevskaya
In 1874 she became the first woman in modern Europe to earn a doctorate in mathematics, and later a full professor in Stockholm.
She said she first met calculus on the wallpaper of her childhood room, which was papered with old lecture notes.
Unknown author, Public domain, via Wikimedia Commons