7-9  űʽ㡣
⣺Enterȷϡ
>> syms x y a b 
>> fun1=sin(x)+cos(y) 
fun1 =
sin(x)+cos(y)
>> fun2=a+b
fun2 =
a+b
>> fun1+fun2
ans =
sin(x)+cos(y)+a+b
>>fun1*fun2 
ans =
(sin(x)+cos(y))*(a+b)
>>
