7-27 ʹdiffз΢ֺ󵼡
⣺Enterȷϡ
>> syms x 
>> diff(x^3+2*x^2+4*x+6)
 ans =
 3*x^2+4*x+4
>>  diff(sin(x^3),4)
 ans =
 81*sin(x^3)*x^8-324*cos(x^3)*x^5-180*sin(x^3)*x^2
>>
