Hello, I'm Jack. I am a student. I have many friends at school. I go to school by bus; the school is near my home. Tom goes to school by bike. John goes to school by car. His mother drives(驾驶) the car. Mary goes to school by taxi. We are happy at school.

计算和化简
⑴${\left(ab\right)}^5·{\left(ab\right)}^2$
⑵${\left(x^2·x^m\right)}^3÷x^{2m}$
⑶$a^2·a^4+{\left(-a^2\right)}^3$ 
⑷$3^0-2^{-3}+{\left(-3\right)}^2-{\left(\frac{1}{4}\right)}^{-1}$
⑸${\left(x-y\right)}^3÷{\left(y-x\right)}^2$
⑹${\left(n-m\right)}^3·{\left(m-n\right)}^2-{\left(m-n\right)}^5$

1). 个人优势介绍(如性格、特长等)；

2). 组织校内活动的设想(如举办讲座、辩论赛、演讲比赛等)；

3). 表达当选的愿望。

注意:词数100左右;可适当增加细节，以使行文连贯。

参考词汇: 主席president   竞选 run for

    Good afternoon, my dear friends,

    Thank you.