Example 3: Evaluating
𝑚𝑥=𝑥2 
𝑓𝑥=𝑥
𝑔𝑥=3𝑥 
𝑛𝑥=𝑥+5 
𝑝𝑥=𝑥2−10𝑥+25
A) 𝑓∘𝑛−4 
B) 𝑛∘𝑓−4