"Art of Electronics" (text) plus "Learning the Art of Electronics" (lab manual).
When you do come up with a recommendation, try Alibris.com for used copies.
Well known secret: All of the textbooks published in the US are also published in India for about 1/10 the cost. They are marked that they are not to be imported back into the US. But sometimes they are! I have several and while the paper is thinner and the binding not as high quality, they contain the same material for a fraction of the cost. Sometimes these show up on Alibris.
As to the equations, they're no help if you can't solve them. There are solvers like wxMaxima, MATLAB, Octave, Maple, Symbolab.com (add Desmos.com for graphing) and so on. But, ultimately, you need to be able to solve the equations yourself to understand what they represent and how the variables interact. Plugging them into a solver gets you the wrong answer to 12 significant digits. Precise but solving the wrong equation.
So, there are some math classes: Calc I, Calc II, Calc III, Differential Equations then Laplace Transforms, Fourier Analysis, Field Theory and so on. It isn't easy getting through these although the first four are lower division college classes normally available at a community college. The thing is, most incoming students won't have the Algebra and Trigonometry skills so there will be a 2 semester course in Pre-Calc. So, figure 6 semesters of lower division math. Calculus isn't difficult as long as your pre-calc skills are adequate. If not, you won't succeed.
A popular text for the first 4 classes (after Pre-Calc) is Stewart:
https://www.amazon.com/Calculus-MindTap-Course-James-Stewart/dp/1285740629This book is terribly expensive but it covers 4 classes so, in some small way, it is a bargain.