A² +b²/2a² 2ab + b/a b

It seems like you're dealing with an expression involving variables \(a\) and \(b\). However, the formatting of the expression is a bit unclear. It appears you may be trying to write a mathematical expression that involves division, multiplication, and possibly some addition or subtraction. If you could clarify or reformat the expression, I can help you simplify or manipulate it. For example, are you trying to express something like: \[ \frac{a^2 + b^2}{2a^2} + \frac{2ab + b}{a}b \] or something different? Please clarify, and I'll be glad to assist!