Chapter R - Elementary Algebra Review - R.4 Polynomials - R.4 Exercise Set - Page 961: 34

$\text{Leading Term: } -t^3 \\\text{Leading Coefficient: } -1$

In descending powers of the variables, the given expression, $ 13+20t-30t^2-t^3 ,$ is equivalent to \begin{array}{l}\require{cancel} -t^3-30t^2+20t+13 .\end{array} The expression above has the following characteristics: \begin{array}{l}\require{cancel} \text{Leading Term: } -t^3 \\\text{Leading Coefficient: } -1 .\end{array}