阅读诗歌，回答问题

石灰吟

千锤万击出深山，

烈火焚烧若等闲。

粉骨碎身全不怕，

要留清白在人间。

短文改错

假定英语课老师要求同桌交换修改作文，请你修改同桌的一下作文。文中共有10处语言错误，每句最多两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意： 1. 每处错误及修改均仅限一词；2. 只允许修改10处，多者（从第11处起）不计分。

    It is well-known that good habits do us good all our life. Entered high school, I took delight in having fast food and often eat too much. In the end, I was so serious overweight that I suffered a lot from my awkward appearance. It made matters worse was the fact that my classmates made a fun of me at times. From now on, I made up my mind to avoiding snacks. In the meanwhile, I took off jogging to lose weight. To my surprise, it was not long until I did succeed in creating my new appearance. Only then I start to appreciate the importance of developing a good habit.

阅读下面这首唐诗，然后回答问题。

落日望乡

孟浩然

客行愁落日，乡思重相催。

况在他山外，天寒夕鸟来。

雪深迷郢路^，云暗失阳台^‚。

可叹凄惶子，高歌谁为媒。

【注】①郢路：泛指楚地之路，孟浩然是襄阳人，襄阳属楚。②阳台：宋玉《神女赋》中楚襄王和神女相会之处。

计算：（﹣12）+（+$\frac{6}{5}$）+（﹣8）+（﹣$\frac{7}{10}$）+（﹣$\frac{1}{2}$）=（　　）