Answer;
[tex]\begin{gathered} 12a^2b^3=2\times2\times3\times a\times a\times b\times b\times b \\ -66pq^2=-1\times2\times3\times11\times p\times q\times q \\ 18x^3y^3=2\times3\times3\times x\times x\times x\times y\times y\times y \end{gathered}[/tex]Explanation:
Given the monomial;
[tex]\begin{gathered} 12a^2b^3 \\ -66pq^2 \\ 18x^3y^3 \end{gathered}[/tex]Expanding we have;
[tex]\begin{gathered} 12a^2b^3=2\times2\times3\times a\times a\times b\times b\times b \\ -66pq^2=-1\times2\times3\times11\times p\times q\times q \\ 18x^3y^3=2\times3\times3\times x\times x\times x\times y\times y\times y \end{gathered}[/tex]Each of the expressions are expressed as a multiple of their simpliest form.