LThe last 3 days wasere full of hard work and different occasionevents, but I am still here and continue to practiceing my English skills.

Today I have completed a free TOEFL Listening task and gained good points for it:

LThe last 3 days wasere full of hard work and different occasionevents, but I am still here and continue to practice my English skills.

I changed "different occasions" to events, because it sounded less awkward.

Today I have completed free TOEFL Listening task and gained good points forscored well on it:

Gained good points isn't natural in this context. Here are some options:

I scored well on it.
I got a good grade on it.
I received a high score on it.

My next step is to prepare a retelling of the text from my Eenglish textbook.

I wish all of you also to haveyou all a good weekends!.

Alternatively:
I hope you all have a good weekend. (This sounds better than I wish you all a good weekend, in my opinion).

LThe last 3 days wasere full of hard work and different occasionevents, but I am still here and continue to practice my English skills.

Today I have completed the free TOEFL Listening task and gainedot a good pointsmark for it:

I also wish all of you also to have a good weekends!

LThe last 3 days wasere full of hard work and different occasionpportunities, but I am still here and continue to practice my English skills.

Today I have completed one free TOEFL Listening task and gained good points for it:

I wish all of you to also to have a good weekends!

LMy last 3 days wasere full of hard work and many different occasionthings, but I am still here and I continue to practice my English skills.

Today I have already completed a free TOEFL Llistening task and gained goodsome points for it:

Or: "Today I did a free TOEFL listening task and gained good some for it"

"Good points" doesn't work, but you could say "lots of points" or "a good number of points"

I wish all of you also to have a good weekends!

Or: "I hope you all also have good weekends!"