I learned how to calculate rational expressions in math class.

The reticulated python is one of the largest snakes in the world.

We could not find the relevant information.

She brought up her child alone.

My grandparents are healthy and living a long life.

She is a mezzo-soprano singer.

He is an expert in enzymology and has conducted many studies in that field.

He is an expert in enzymology and conducts many researches.

My grandmother is suffering from osteoporosis.

I always put hot sauce on my tacos.