Question 1173364
1. 2 is coefficient, y is variable; -3 is coefficient, x variable; mn variables, 1 is coefficient;  1/2 is coefficient, x variable;-0.4 coefficient, gh variables.
2. Trinomial, 3 terms.
3. 1 term; 3 terms; 2 terms; 3 terms; 2 terms; 4 terms
4.2, the highest exponent when there is only one variable.
5.2; 2; 6;5;3
6. not clear what is wanted.