The LXX in some verses weakens the Oneness message.
Note
Isaiah 9:6-7 from it:
6 For a child is born to us, and a son is given to us, whose government is upon his shoulder: and his name is called the Messenger of great counsel: for I will bring peace upon the princes, and health to him. 7 His government shall be great, and of his peace there is no end: it shall be upon the throne of David, and upon his kingdom, to establish it, and to support it with judgment and with righteousness, from henceforth and forever. The seal of the Lord of hosts shall perform this.
Compared to the Masorite Text:
6: For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counseller, The mighty God, The everlasting Father, The Prince of Peace.
7: Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
Which one is inspired?