a,\(5^3:\left(-5\right)^2=5^3:5^2=5^{3-2}=5\)
b,\(\left(\dfrac{3}{4}\right)^5:\left(\dfrac{3}{4}\right)^3=\left(\dfrac{3}{4}\right)^{5-3}=\left(\dfrac{3}{4}\right)^2\)
c,\(\left(-12\right)^3:8^3=\left(\left(-12\right):8\right)^3=\left(-\dfrac{3}{2}\right)^3\)
