An oldie but goodie equation is the famous Pythagorean theorem which every beginning geometry student learns. Mathematical formulas are complex text objects in which multiple elements with various metric style or positioning attributes are combined. This list was not organized by years of schooling but thematically.
Discount rate discount list price.
Interest principal rate of interest time. This list was not organized by years of schooling but thematically. X denotes the mean of the n observations ie x x 1 x 2 x n n. In order for a math-layout engine to support layout of mathematical formulas several types of font-specific information particular to the layout of formulas are required.