Let f(x) = x^2 + 5 and g(x) = x+5/x. Find (g o f)(-3)

First, we need to find f(-3):

f(-3) = (-3)^2 + 5 = 9 + 5 = 14

Next, we need to find g(f(-3)):
g(f(-3)) = g(14) = 14+5/14 = 99/14

Therefore, (g o f)(-3) = 99/14.