题目

One determined student stepped off the traditional job for blind people in China, and now challenges a new life at university in Britain. Being a message therapist （按摩师）is a perfect job for many people with a visual disability, but for Zheng Jianwei, it was far from enough. The 30-year-old former massage therapist gave up his hospital job in 2009to prepare for admission to graduate school. He took IELTS（雅思考试）, the language-fluency test necessary for university admission in the UK, in 2012 and scored 6.5 points. He was the first blind examinee to take the IELTS in 1．计算：（1）（x-$\frac{1}{3}$）（x+$\frac{1}{4}$）；（2）（3a-2）（2a-3）；（3）（3x-1）（9x2+3x+1）