If eleven plus two equals one, what does nine plus five equal?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

How can one talk without saying a single word?

Using eight eights and addition only, can you make 1000?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?