#### Answer

Standard form: $-2x^3$
Degree = 3
Number of terms = 1
Thus, the polynomial is a cubic monomial.

#### Work Step by Step

Distribute $x^2$ to have:
$=3x^4-2x^3-3x^4$
Combine like terms to have
$\\(3x^4-3x^4)-2x^3
\\=0 - 2x^3
\\=-2x^3$.
This polynomial has degree 3 and has one term.
Thus, it is s cubic monomial.