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Classified（分类）Ads For direct classified service, call 800-0667 10 a.m.— 4 p.m., Monday—Friday. For Rent Best on Campus     Excellent Room for girls, begins Jan. , 2, 4, or 8 months lease(租约). Single, $105. Double, $140. Call 800-1932.     Family Home, 3 bedrooms, large yard. $275. Call 800-4300. For Sale Sheepskin Coat, men’s size 42, 1year old. $85. After 6 p.m. call 800-5224. Moving: Must sell. Color TV 21, $150; transistor radio（晶体管收音机）, $15; recorder, $25. Call 800-0739. Help Wanted Babysitter — My home     If you could find a few hours during t已知函数f（θ）=-12+sin52θ2sinθ2（0＜θ＜π），将f（θ）表示成关于cosθ的多项式．