public static void Subtract(ref Matrix3x2 a, ref Matrix3x2 b, out Matrix3x2 result)
{
float m11 = a.M11 - b.M11;
float m12 = a.M12 - b.M12;
float m21 = a.M21 - b.M21;
float m22 = a.M22 - b.M22;
float m31 = a.M31 - b.M31;
float m32 = a.M32 - b.M32;
result.M11 = m11;
result.M12 = m12;
result.M21 = m21;
result.M22 = m22;
result.M31 = m31;
result.M32 = m32;
}