Need solution with steps please

12) Find the definite integral 30 x2 (23 + 2021 ) doc Find the definite integral elo ( Ln x ) * doc 16 Find the average value f (x) = 21 Vox+9 over Co.7] + ) Find the region completely enclosed by flic)=+ 5 and g(25) = 2c2 + nc - 4 Hint: Play > q ( x ) in the region 7/ show that the limits of integration are a = - 3, b = 3 using algebra b/ Find the area of the region. use a = - 3, b = 3