#exponent.mathematical_notation__power__index  a mathematical notation indicating the number of times a quantity is multiplied by itself
  supertype:  mathematical_notation  a notation used by mathematicians
  subtype:  degree.exponent  the highest power of a term or variable
     subtype:  degree_of_a_term  the sum of the exponents of the variables in the term
     subtype:  degree_of_a_polynomial  the degree of the term in the polynomial that has the highest degree
  subtype:  logarithm__log  the exponent required to produce a given number
     subtype:  common_logarithm  a logarithm to the base 10
     subtype:  natural_logarithm__naturallogarithm__Napierian_logarithm  a logarithm to the base e

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