Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

What is the next number in this matchsticks series riddle?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?