18 Test file number 28

  18.1 Problem number 1
  18.2 Problem number 2
  18.3 Problem number 9
  18.4 Problem number 10
  18.5 Problem number 17
  18.6 Problem number 18

Test folder name:

test_cases/1_Algebraic_functions/1.1_Binomial_products/1.1.3_General/28_1.1.3.6-g_x-^m-a+b_x^n-^p-c+d_x^n-^q-e+f_x^n-^r