What do you see in the given picture?

Can you solve the below tricky visual equation?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Solve the following series:
AZ, GT, MN, __, YB

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Which wheel of car does not rotate when you turn your car right?

I cannot talk, but I always reply when spoken to. What am I?