"Mathematical equations" refers to statements that show a relationship between different mathematical quantities, using symbols and numbers. It's a way to describe and solve problems in math by expressing them through equations. Full definition
A model is a combination of a series of mathematical equations connected by logic. (judithcurry.com)
Most divide the atmosphere into hundreds of boxes, each of which is represented by mathematical equations for wind, temperature, moisture, incoming radiation, outgoing radiation, and the like. (discovermagazine.com)
It can even help professionals in the field, who need to solve complex mathematical equations. (childdevelopmentinfo.com)