QuickMath is one of the most useful sites for common but tedious mathematical calculations. It is a free "online calculator that solves equations and does all sorts of algebra and calculus problems." Separated into many different functional sections, this handy tool can simplify expressions, evaluate symbolic integrals, plot equations, and much more. When inputting a problem into QuickMath for it...

According to its author, this site was created to provide the public with an "'upper secondary' math tutorial." It is immediately apparent that this can include many different subject areas and, indeed, the site addresses topics ranging from trigonometry to linear algebra to calculus. Each concept is introduced with clear, concise explanations and illustrative figures, and several sample problems...

Critical Point is a feature of the online version of the magazine Physics World. The article posted here, by philosopher and historian Robert Crease, revisits "the greatest equations ever." He presents the results from his survey of readers in which he asked for a short list of nominations for great equations and "to explain why their nominations belonged on the list and why, if at all, the topic...