I urgently need you to check the following sentences. Thank you.

1) The dominant themes in Shakespeare's Macbeth are as follows. (I don't think " as follows" is correct because it should be followed by a colon)
2) The regicide brings about chaos. Actually, the sky is troubled and the horses start to eat one another.
3) The last theme is the reversal of values "beautiful is ugly and ugly is beautiful" introduced by the three witches.
4) With these metaphors (By using these metaphors) Macbeth wants to stress that it is sleep that removes our cares.
5) The first theme is (that of) the reversal of values.

1) The dominant themes in Shakespeare's Macbeth are as follows. (I don't think " as follows" is correct because it should be followed by a colon)

You're right. There needs to be a colon there and immediately following should be a list or a series of specifics.

2) The regicide brings about chaos. For example, the sky is troubled and the horses start to eat one another.

3) The last theme is the reversal of values -- "beautiful is ugly and ugly is beautiful" -- introduced by the three witches.

4) By using these metaphor, Macbeth stresses that it is sleep which removes our cares.

5) The first theme is that of the reversal of values.

1) The correct way to indicate that a list of dominant themes in Shakespeare's Macbeth will follow is to use a colon. So the sentence should be revised as follows: "The dominant themes in Shakespeare's Macbeth are:"

2) It seems like you are giving additional information about the chaos that the regicide brings about. To clarify, you can revise the sentence as follows: "The regicide brings about chaos, which is depicted by the troubled sky and the horses turning on each other."

3) The phrase "beautiful is ugly and ugly is beautiful" refers to the reversal of values introduced by the three witches. To make the sentence clearer, you can revise it as: "The last theme is the reversal of values, which is introduced by the three witches as 'beautiful is ugly and ugly is beautiful'."

4) To indicate that Macbeth is using metaphors to stress the point about sleep removing our cares, you can revise the sentence as: "Macbeth emphasizes that it is sleep that removes our cares by using these metaphors."

5) To clarify the sentence, you can either include "that of" or rephrase it as follows: "The first theme explores the reversal of values."