Answer :
[tex]1. (-7w)^3=-343 w^{3} \\ 2. (3 t^{2} ) (-5 t^{6} )=-15 t^{8} \\ 3. (6y^2)^3=216 y^{6}
[/tex]
(-7w)^3 = -7w * -7w * -7w = -343w^3
(3t^2)(-5 + 6) = (3t^2)(1) = 3t^2
(6y^2)^3 = 6^3 y^(2 * 3) = 216y^6
(3t^2)(-5 + 6) = (3t^2)(1) = 3t^2
(6y^2)^3 = 6^3 y^(2 * 3) = 216y^6