Calculus was invented as a tool for solving problems. Prior to the development of calculus, there were a variety of different problems that could not be addressed using the mathematics that was available.
The discovery of calculus is often attributed to two men, Isaac Newton and Gottfried Leibniz, who independently developed its foundations. Although they both were instrumental in its creation, they thought of the fundamental concepts in very different ways.
The basic parts of Calculus include: Limits, Derivatives, Integrals, and Tanget lines.Ranging from easiest to hardiest from a student's view: Derivatives, Tanget lines, Limits, and Integrals.