Which expression is equivalent to (r^-7)^6? r^42 1/r^42 -7r^6 1/r

What is the sum of these mixed numbers 4 2/3+ 3 1/9

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0