>>12344258I think of Calculus as basically just the core idea of limits, with literally everything else being built upon it and applying it to various things. For example, make a number infinitely large or infinitely small. You can’t do this normally in math, but with the concept of limits you basically can. Very common uses of this are making two points get infinitely close together, effectively allowing you to get the slope of a single point ("derivative"), and figuring out the area of a weirdly-shaped thing by adding the areas of an infinite number of infinitely-small rectangles that fit inside that weird area ("integral").
