例7-16  復合函數的運算。
解：在命令窗口中輸入如下命令，并按Enter鍵確認。
>> syms x y z t u
>> f = 1/(1 + x^2) 
f =
1/(1+x^2)
>> g = sin(y)
g = 
sin(y)
>>  h = x^t
h =
x^t
>>  p = exp(-y/u) 
p = 
exp(-y/u) 
>> compose(f,g)
ans = 
1/(1+sin(y)^2)
 >> compose(f,g,t)
ans =
1/(1+sin(t)^2)
>> compose(h,g,x,z)
ans = 
sin(z)^t
>> compose(h,g,t,z) 
ans =
x^sin(z)
>>compose(h,p,x,y,z)
ans =
exp(-z/u)^t
>>compose(h,p,t,u,z)
ans =
x^exp(-y/z)
>>