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calculus
No, not really.
Newton "invented" "applied mathematics" and calculus.
Newton was primarily a physicist. He invented calculus in order to understand and explain the laws of physics. He and Leibniz in Germany independently invented the calculus.
Everything but notation. Newton calculus is a little under developed because of its once scarce use.
Set notation, interval notation, some knowledge about logical statements and mathematical proof. Knowledge on sequences, functions, trignometry, exponential and logrithimic are assets as when you get deeper into Calculus you do have formal definitions for them.
Leibniz's contribution was more on developing the theoretical basis and the notation whereas Newton's was more in its application.
Issac Newton's contribution was Law of Gravity, Action/Reaction and Calculus
Newton's contributions also include light, chemistry, telescope, and calculus.
mass*acceleration due to gravity.
He invented most of the notation and gave a rigorous structure to the subject.
Newton is the named founder of Calculus. Yet there is controversy because it is claimed that Leibniz stole Newton's Calculus notes and took all credit for Calculus. But to this day Leibniz's integral and derivative notation is more commonly used that Newton's which was found confusing.