Chapter 1, Problem 9P

Define the variables a, b, c, and d as:

$a=12,b=5.6,c=\frac{3a}{b^2}$ , and $d=\frac{{\left(a-b\right)}^c}{c}$ , then evaluate:

$(a)\frac{a}{b}+\frac{d-c}{d+c}-{\left(d-b\right)}^2(b)\frac{d-c}{e^{a-2b}}+\ln \left(\left|c-d+\frac{b}{a}\right|\right)$