WEB 2.0 CALC is an online scientific calculator that can compute algebra, geometry and finance problems. It can also handle calculus, functions, number theory and other advanced math topics. Another option with limited features but similar capabilities is the Alcula scientific calculator.
WEB 2.0 CALC offers tips on how to correctly enter a formula so that the calculator can compute it. It also has a math forum where users can ask for help with difficult math problems. Alcula offers a detailed instruction manual and a blog that describes common features and how to use them. It also offers a variety of other types of calculators, including simple ones that perform basic functions.