what is the expression in standard form

Answer:
14x^2+10x-8
Step-by-step explanation:
If you simplify 2x^2 and 12x^2, then you get 14x^2, and the quadratic equation standard formula is
Ax^2+Bx+C
and nothing else can be simplified so you just arrange the numbers in the correct equation formula and you got your answer! :)