b/2 - b+a/2
b over 2 - b+a over 2
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016
edited by
Guest
Dec 11, 2016