Original sentence: They are often referred to as "UVAST", "SUVAT", "VUSAT", "VUATS" or "UVATS" equations, as the 5 variables they involve are often represented by those letters (s = displacement, u = initial velocity, v = final velocity, a = acceleration, t = time)
Edited sentence: They are often referred to as "UVAST", "SUVAT", "VUSAT", "VUATS" or "UVATS" equations, as the five variables they involve are often represented by those letters (s = displacement, u = initial velocity, v = final velocity, a = acceleration, t = time)