Words

Life is an equation, it starts with a formula and ends with equality.

In English sentences start with a capital (big) letter.

Sentences usually have a subject - the person doing the verb - here it is 'it' which refers back to the earlier phrase.

In English most nouns have an article or determiner - here formula has the indefinite article 'a'  because we don't know which formula.

words

life is an equation. It starts with a formula and ends with equality.