What do I mean? Listen to the clues

Question

Let me start off with two long clues:

There is nothing here560378

there is a secret Text yo^u^ mus4t decipher from my writing. scan every word carefully so+that+you don't m3iss any information. {go}od luck.

There is nothing here342013

there is tHe va5lley(or was a valley9), In the valley Sings a swin*g a(n)d sings a songberd. the bird that sung was a swan,

There is nothing here392050

nExt to tHe valley was a frog pond, the frog pond was large, i like that frog pond,

There is nothing here907768

then there was nothing more,

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Hints:

Hint 1

There is a very common code in use here, beware of the red herrings!

Hint 2

Two words from the first line are very important

Hint 3

The answer is a single word

Hint 4

Ignore what the cypher tells you to

Answer 1

Partial answer:

If you take all the mistakes and brackets out and put them together they make this: T^^4++3{} H59IS*() EH