An equation is a **mathematical equality formed by two expressions that contain one or more unknowns** that can be solved (solved) through a succession of mathematical operations. Said like this, there will be many who raise an eyebrow as a sign of incomprehension or doubt and **curse to themselves that old enemy of the school age** that is mathematics. This is probably one of the formal sciences **most misunderstood by society** and yet the **most basic for understanding the world around us** and the universe we inhabit. Mathematics is the central gear that turns all the other elements that make up the cosmos.

Without this **abstract science** , it would not have been possible to develop or **verify much of the knowledge that we have** in other fields such as physics, chemistry, engineering and **even medicine and the social sciences** . The laws of nature and artificial laws are **expressions of a phenomenon explained by mathematics** so that humans can understand (or at least try). What at first glance is nothing more than a succession of letters, numbers and symbols that we suppose to have a certain order, actually hides **the answers to questions that humanity has been asking for a long time** .

Perhaps those equations are unknown to those who do not study the corresponding field or who do not have a **real interest in the subject** , but a quick search on the Internet or in a book will make names like **Pythagoras, Newton, Maxwell or Einstein** begin to sound like us. far away. The so-called “popular culture” makes these names **recognizable in almost any part of the world** , although not all of us can understand what the work of these geniuses of their time consisted of. In order to **make the work of mathematicians, physicists or engineers a little more accessible,** scientist **Ian Stewart** has put together a list of some of the **equations that changed the world** .