I had to undergo surgery to remove a calculus from my kidney.

The memories we create last a lifetime.

She learned how to weave baskets from her grandmother.

The company is exploring new lateral strategies to increase profits.

Supposedly, the old mansion is haunted by ghosts of the previous owners.

Plants require minerals for their growth.

The incumbent president is seeking re-election.

He has a problem with his lung.

The radius of the circle is 5 centimeters.

Calculus is an integral part of mathematics.