problems 7-9, 12, 14-22, 31-41, 43i need help working them out

answer 7 ✒(12)^4 = 12 ×12 × 12 ×12 answer 8✒2(a)^4 = 2 × a ×a ×a× aanswer 9 ✒m^4n^3 = m× m× m× m n× n× n answer 12 ✒ give a =3, b= -2 ,c =4now solve 3a^2bput the value of a and b, we get4× (3)^2 × (-2)= 4 × 9 × (-2)= -72 answer 14 ✒10 .10 .10 .10 = (10)^4answer 15 ✒ (-2)( -2 )(-2 )(-2) =( -2)^4answer 16✒ 6 = 6. ( no change)answer✒ 21 3.x.x.y.y = 3. x^2. y^2answer 22✒ (-5)(m)(m)(m)(m)(n) = -5 .m ^3 .nnow i tried now⚠⚠⚠⚠i hope this will be helpful 4 you.thank you____❤