View Compilation Error

0_0_36761387_2868.cpp: In function 'bool ck(long double)':
0_0_36761387_2868.cpp:79:77: error: expected ')' before 'tt'
     long double unt=exp(log(v)+log(sin(mid))+log(tt))-exp(log(g)+2.0*log(tt)tt-log(2.0));
                                                                             ^