Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

Why did Buffon take the goal with him after every Juventus match?

What is wrong in the below Picture?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

What kind of band never plays music?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

O_er_t_o_

Complete the missing letters of the given word.