I hope you find the corrections useful.  Feel free to massage me if you wish to ask for detailed explanations for it.

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I'm going to attend the term's final exam in the next two weeks, preparing many information about the exam. Every time an exam closes, the printing shops are at their busiest, because students will go there to print everything about the whole semester. For this occasion, the owner of a shop can earn much money from students as they provide our convenience and gain profits at the same time. It sounds fair to all. Thus, let's all corporate again to create more mutually beneficial opportunities.
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Entering a Busy Period

i'm going to attend the term's final exam in the next two weeks,preparing many informations about exams.every time exam closes,the printing shop is the best busy.students go to print all about the whole semester.in the period,the owner of shop can earn much money from students.the shop provide our convenience,at the same time,they gain their profits.it sounds equal to all.thus,let's corporate again to create more mutual-benefit opportunities.