61 Test file number 104

  61.1 Problem number 12
  61.2 Problem number 13
  61.3 Problem number 30
  61.4 Problem number 31

Test folder name:

test_cases/4_Trig_functions/4.3_Tangent/104_4.3.3.1-a+b_tan-^m-c+d_tan-^n-A+B_tan-