View Compilation Error

0_0_17314694_18125.c: In function 'main':
0_0_17314694_18125.c:17:3: error: expected expression before '/' token
   //left=m-((s-1)*(f[n-1]+1)+1);
   ^
0_0_17314694_18125.c:37:3: error: expected expression before '/' token
   // left=m-((s-1)*(f[n-1]+1)+1);
   ^