Question

Can an equation be considered standard form if it has more than 3 terms

for example is this considered standard form?

21x^3+6x^2-43x+20

also can standard form contain fractions?

for example

2x+3+[11/(x-3)]

Answer 1

yes, standard form for a polynomial can have more than three forms.
http://www.mathwarehouse.com/dictionary/S-words/definition-of-standard-form-of-a-polynomial.php
your second example, no, that is not standard form.

Answer 2

How would I write the second one in standard form then?