12 Test file number 31

  12.1 Problem number 139
  12.2 Problem number 140
  12.3 Problem number 141
  12.4 Problem number 143
  12.5 Problem number 144
  12.6 Problem number 148
  12.7 Problem number 150
  12.8 Problem number 151
  12.9 Problem number 152
  12.10 Problem number 153
  12.11 Problem number 154
  12.12 Problem number 156
  12.13 Problem number 157
  12.14 Problem number 158

Test folder name:

test_cases/1_Algebraic_functions/1.1_Binomial_products/1.1.4_Improper/31_1.1.4.3-e_x-^m-a_x^j+b_x^k-^p-c+d_x^n-^q