4. (10 pts.) Simplify by hand using properties of logarithms. Your final answer should be an integer. Only use a calculator to check your answer or multiply/divide, not to evaluate any logarithms. a. 10g12 (3456) + 10g12 (6) b. log6 (5038848) - 10g6(18) 5. (15 pts.) Simplify as indicated. a. Expand the expression as a sum, difference, and/or constant multiple of logarithms. y - 1 log7 X423 b. Condense the expression to a single logarithm of a single quantity. 5 In x -In(x - 3) + 2In(x + 3)