He is working hard to rationalize the equation.

There are laws of all things in this world.

I got a higher salary this month, and I have a little surplus.

He is studying about orpiment, which was used in ancient artworks.

He is my good friend.

He proved his excellence in that project.

He has total possession of the company.

He possesses that land.

This drink contains vitamin C.

This juice contains vitamin C.