More like: bad culture fit, expects a standard library that handles infinite quantities and complex numbers out of the box. Edit: how about (Math.Pow(a+b, 2)

More like: bad culture fit, expects a standard library that handles infinite quantities and complex numbers out of the box. Edit: how about (Math.Pow(a+b, 2) - Math.Pow(a,2) - Math.Pow(b,2))/2