תודה לכם על העזרה; בלי העזרה שלכם היה לי קשה להתרכז ולסכם את הכול.

לכם means to you or to you all.

In Hebrew, תודה ל... is a very common pattern for saying thanks to someone:

• תודה לך = thank you, to one person
• תודה לכם = thank you, to more than one person, or to a mixed/masculine group
• תודה לכן = thank you, to a feminine plural group

So תודה לכם is literally thanks to you.

Yes. That would still be perfectly natural.

• תודה על העזרה = thanks for the help
• תודה לכם על העזרה = thank you for the help / thanks to you for the help

Adding לכם makes the recipient explicit and can sound a little warmer or more personal.

After תודה, Hebrew often uses על to introduce what you are thanking someone for.

So the pattern is:

• תודה ל... על... = thanks to ... for ...

Examples:

• תודה לך על הזמן = thank you for your time
• תודה לכם על העזרה = thank you for the help

This is just a standard Hebrew pattern.

העזרה means the help. Hebrew often uses the definite article when referring to a specific, known help already understood from the situation.

So:

• עזרה = help, assistance in general
• העזרה = the help, the specific help

In this sentence, the speaker is thanking them for a particular help they gave, so העזרה sounds natural.

They do two different jobs:

• לכם = to you / for you
• שלכם = your / yours

So:

• תודה לכם = thanks to you
• העזרה שלכם = your help

A useful shortcut:

• forms with ל־ often show direction, recipient, or benefit
• forms with של show possession

In normal Hebrew, possessive words like שלי, שלך, שלכם usually come after the noun.

So Hebrew says:

• הספר שלי = my book
• הבית שלהם = their house
• העזרה שלכם = your help

That word order is the standard one.

There is also a shorter, more formal/literary style using suffixes, such as עזרתכם, but העזרה שלכם is very common and natural.

Yes.

בלי העזרה שלכם means without your help, and it is completely natural. But Hebrew has other ways to say something similar:

• בלעדיכם = without you
• בלי עזרתכם = without your help

The sentence you have is a straightforward, clear everyday version.

That is exactly how Hebrew often expresses this idea.

• קשה לי = it is hard for me
• היה לי קשה = it was hard for me
• יהיה לי קשה = it will be hard for me

Hebrew uses ל־ plus a pronoun to mark the person experiencing the difficulty:

• לי = to me
• לך = to you
• לו = to him
• לנו = to us

So היה לי קשה להתרכז is literally structured as it was hard for me to concentrate.

Because the sentence is not describing the speaker as a difficult person. It is describing the situation as difficult for the speaker.

• היה לי קשה = it was hard for me
• הייתי קשה = I was hard / difficult / harsh

So הייתי קשה would mean something very different.

In your sentence, the meaning is about difficulty in doing something, so היה לי קשה is the correct structure.

Because Hebrew often uses the simple past in this kind of without... statement, and the unreal or hypothetical meaning is understood from context.

So:

• בלי העזרה שלכם היה לי קשה...

can naturally mean:

• Without your help, it would have been hard for me...

Hebrew does not always need a separate word matching English would in this kind of sentence. The conditional sense is often implied.

After קשה or היה קשה, Hebrew usually uses an infinitive to say what was hard to do.

Examples:

• קשה לי להבין = it is hard for me to understand
• היה לי קשה לעבוד = it was hard for me to work
• היה לי קשה להתרכז ולסכם = it was hard for me to concentrate and summarize

So להתרכז and לסכם are both infinitives: to concentrate and to summarize.

את marks a definite direct object.

Here, הכול means everything or the whole thing, and it is definite, so Hebrew uses את before it:

• לסכם את הכול = to summarize everything

Compare:

• קראתי ספר = I read a book
• קראתי את הספר = I read the book

So in your sentence, את is there because הכול is the direct object and it is definite.

They are the same word in meaning and pronunciation.

Both mean everything / all / the whole thing, and both are pronounced hakol.

• הכול is a fuller spelling
• הכל is also very common

So if you see either spelling, do not treat them as different words.

The semicolon separates two closely connected parts:

1. תודה לכם על העזרה
2. בלי העזרה שלכם היה לי קשה להתרכז ולסכם את הכול

It works like a stronger pause than a comma, but it still shows the two parts belong together. In ordinary writing, some people might use a comma or a period instead. The meaning does not really change.