88 Test file number 170

  88.1 Problem number 51
  88.2 Problem number 52
  88.3 Problem number 55
  88.4 Problem number 56
  88.5 Problem number 57
  88.6 Problem number 65
  88.7 Problem number 66
  88.8 Problem number 68
  88.9 Problem number 69

Test folder name:

test_cases/6_Hyperbolic_functions/6.2_Hyperbolic_cosine/170_6.2.7_hyper^m-a+b_cosh^n-^p