70 Test file number 113

  70.1 Problem number 1
  70.2 Problem number 9
  70.3 Problem number 10
  70.4 Problem number 11
  70.5 Problem number 12
  70.6 Problem number 13
  70.7 Problem number 15
  70.8 Problem number 18
  70.9 Problem number 45
  70.10 Problem number 48
  70.11 Problem number 49
  70.12 Problem number 51
  70.13 Problem number 52
  70.14 Problem number 53
  70.15 Problem number 54
  70.16 Problem number 56
  70.17 Problem number 57

Test folder name:

test_cases/4_Trig_functions/4.4_Cotangent/113_4.4.7-d_trig-^m-a+b-c_cot-^n-^p