Writing for an academic paper is different from creative writing. For one thing, the writing style in an academic writing is mostly formal, stilted and boring, well mostly. In an academic writing, you are strongly urged to use the active voice to convey your arguments or findings. When you can afford to be wordy in creative writing but not in academic writing. In creative writing, eyou are limited only by how much you want to express. In academic writing, however, you should cut down on the use of unnecessary words as much as you can.
So, chop, chop! Cut down on those words, will you?
But how to keep it brief, concise and direct to the point?
Let's see some examples, shall we?
1.) a. The goal of the organization is to provide assistance to the financially challenged. 
b. The organization's goal is to help the poor. 
2.) a. He has confidence that the theory will be put to the test. 
b. He is confident the theory will be tested. 
3.) a. You can find the list of names of the players put up on the notice board. 
b. You can find the players' name list posted on the notice board. 
4.) a. You should not leave a trauma patient alone without attention. 
b. You should not leave a trauma patient unattended. 
As can be seen from the above examples, it is not that difficult to keep your writing short and sweet. What you need is some technical knowhow on how to go about it. Why don't you give it a try?