View Compilation Error

0_0_18831531_31450.cpp: In function 'double getVa(double)':
0_0_18831531_31450.cpp:70:71: error: expected ')' before ';' token
     return sin(a)-((sin(a)*sin(a)*sin(a))/3.0)+((PI*cos(a))-(a*cos(a));
                                                                       ^