Step 1:
Write the expression.
[tex](-10x^6)(-7x^3\text{ )}[/tex]Step 2:
Apply the multiplication law of exponent.
[tex]\begin{gathered} (-10x^6)(-7x^3\text{ )} \\ =\text{ -10 }\times-7x^{6+3} \\ =70x^9 \end{gathered}[/tex]Final answer
[tex]70x^9[/tex]