Do mathematical formulas have to use Greek letters rather than useful variable names like "distance" or "speed"?
The moment you are talking 'distance' and 'speed', you are talking physics (aka applied mathematics), not mathematics.
The same math might see applications in economics, where the variables are better called 'piggy bank target' and 'weekly savings', or in biology, where they call them 'weight needed to survive the winter' and 'excess food intake' or elsewhere in physics, where they are called 'velocity' and 'acceleration'.
Mathematics is abstraction; that is what makes it applicable in diverse fields.
The moment you are talking 'distance' and 'speed', you are talking physics (aka applied mathematics), not mathematics.
The same math might see applications in economics, where the variables are better called 'piggy bank target' and 'weekly savings', or in biology, where they call them 'weight needed to survive the winter' and 'excess food intake' or elsewhere in physics, where they are called 'velocity' and 'acceleration'.
Mathematics is abstraction; that is what makes it applicable in diverse fields.