Classify the following as a constant,linear,quadratic,or cubic polynomial: $2-x^{2}+x^{3}$

(D) polynomial of degree $n$ is classified based on the highest power of the variable present in the expression.
For the given polynomial $p(x) = 2 - x^{2} + x^{3}$,the highest power of the variable $x$ is $3$.
$A$ polynomial of degree $3$ is called a cubic polynomial.
Therefore,$2 - x^{2} + x^{3}$ is a cubic polynomial.