Question 312021
Terms are the variable expressions {{{1}}},{{{x}}}, {{{x^2}}}, {{{x^3}}}, etc. in powers of x. 
The coefficients are the constants in front of them.
As an example,
{{{9x^2+3x+5}}} 
9 is the coefficient of the {{{x^2}}} term and 3 is the coefficient of the {{{x}}} term, and {{{5}}} is the coefficient of the {{{x^(0)=1}}} term.