View Compilation Error

0_0_32864529_24605.cpp: In function 'int main()':
0_0_32864529_24605.cpp:24:9: error: expected primary-expression before '<' token
         <span style="white-space:pre"> </span>b=(pow(3,n+1)-1)*15;
         ^
0_0_32864529_24605.cpp:24:10: error: 'span' was not declared in this scope
         <span style="white-space:pre"> </span>b=(pow(3,n+1)-1)*15;
          ^
0_0_32864529_24605.cpp:25:8: error: expected primary-expression before '<' token
        <span style="white-space:pre">  </span>c=(pow(22,n+1)-1)*18;
        ^
0_0_32864529_24605.cpp:26:9: error: expected primary-expression before '<' token
         <span style="white-space:pre"> </span>printf("%d\n",(((a*b)%29)*c)%29);
         ^