Plzzzzz i need the solution to this plzzzzzzz

Answer:
−a2+b2/2a2+ab−3b2
Step-by-step explanation:
b2−a2/2a2+ab−3b2
=
−a2+b2/2a2+ab−3b2
The Equation is already in its simplest form. There are no terms to combine in this type of equation.