18 Test file number 38

  18.1 Problem number 4
  18.2 Problem number 5
  18.3 Problem number 6
  18.4 Problem number 7
  18.5 Problem number 8
  18.6 Problem number 9
  18.7 Problem number 14
  18.8 Problem number 16
  18.9 Problem number 17
  18.10 Problem number 195
  18.11 Problem number 206
  18.12 Problem number 207

Test folder name:

test_cases/1_Algebraic_functions/1.2_Trinomial_products/1.2.1_Quadratic/38_1.2.1.9_P-x-d+e_x-^m-a+b_x+c_x^2-^p