I need help with Math Calculus Integration problems Please refer to an attachment to these questions or comment

Question

I need help with Math Calculus Integration problems. Please refer to an attachment to these questions or comment

the explanation for the answers

1. Evaluate the following indefinite integrals:
a. J 2×3 + (12/x5) – 7e4x dx
b. J (x+ 3) / (x2 + 6x)? dx
2. Evaluate the definite integral:
5
S (6x? – 3x + 5) dx
2
3. Find the area lying between f(x) = -x? + 1 and g(x) = 2x + 4, from x =-1 to x = 2
4. Find the area between the curves y = – x3, y = 0, x = – 3, and x = 1
Math