I would check out Mathematics: From the Birth of Numbers by Jan Gullberg Beautiful book, goes from the counting numbers to partial differential equations. It

I would check out Mathematics: From the Birth of Numbers by Jan Gullberg Beautiful book, goes from the counting numbers to partial differential equations. It's also a delight to read. I would start that as a survey of mathematical concepts, and then move on to a good math engineering/physics textbook, like Mathematical Methods in the Physical Sciences by Mary L. Boas