6 Test file number 15

  6.1 Problem number 149
  6.2 Problem number 150
  6.3 Problem number 153
  6.4 Problem number 154
  6.5 Problem number 155
  6.6 Problem number 158
  6.7 Problem number 159

Test folder name:

test_cases/1_Algebraic_functions/1.1_Binomial_products/1.1.1_Linear/15_1.1.1.4-a+b_x-^m-c+d_x-^n-e+f_x-^p-g+h_x-^q