Scientific American spoke to Rojas about this history, the deeply engaging humanity of mathematics and the egos at play in defining the mathematical language we take for granted today.

For example, to write the formula for calculating the volume of a cylinder, you'd start by expanding the Greek letters dropdown to choose the pi symbol. Then, go to Math operations dropdown ...

To solve basic math operations — and more complicated ones ... At this age, your child is starting to learn the symbols for subtraction, addition and equal. Create stories about subtraction ...