Evaluate the following definite integrals. (a)`underset(0)overset(3)int(x^(2)+1)dx` (b)`underset(2)

Evaluate the following definite integrals. (a)`underset(0)overset(3)int(x^(2)+1)dx` (b)`underset(2)overset(3)int(x^(3)-4x^(2)+5x-10)dx` (c)`underset(0)overset(pi//4)int(cosx-sinx)dx`