NORMAN (AP) — Taylor Robertson scored 21 points, Ana Llanusa added 20 and Oklahoma won for the first time in the Big 12/SEC Challenge, drubbing No. 25 LSU 90-68 on Saturday. Mandy Simpson scored 18 points and grabbed 10 rebounds for the Sooners, who scored the last nine points of the first quarter to lead 23-16 and added a 14-0 run starting midway through the second quarter to lead 51-32 at the…