[tex]-\frac{3}{10}xy(60xy^6)=[/tex]
Combining similar terms:
[tex]\begin{gathered} =(-\frac{3}{10}\cdot60)(x\cdot x)(y\cdot y^6)= \\ =-18(x\cdot x)(y\cdot y^6)= \end{gathered}[/tex]
Applying the product rule of exponents:
[tex]\begin{gathered} =-18(x^{1+1})(y^{1+6})= \\ =-18x^2y^7 \end{gathered}[/tex]
