If math is the bane of your existence, Wolfram Alpha has probably been of great use to you. It's a powerful tool, but it can be a pain to enter mathematical functions. The newest apps from the Wolfram Alpha team take a more focused approach to helping you with your homework. The algebra and calculus course assistants put all the operations you need right up front so you can get the right answer faster than your stupid meat-space brain can ever hope to.
Both apps have a handy home page with links to the functions you're likely to need. The algebra app can solve equations, expand polynomials, and so on. This will help get you navigate algebra I, II, and college-level algebra. If you're slogging through calculus (up to college-level), the calc version of the app can handle all sorts of functions, integrals, and limits. Each app has a special built-in keyboard with the symbols and operators you'll need to input data.
The Calculus Course Assistant runs $3.99, and Algebra Course Assistant will cost just $1.99. It's a small price to pay if this little bit of help can get you through a challenging course. Before you take the plunge, keep in mind you must have a data connection to use Wolfram Alpha services.