Englishfor English speakers
formula
Noun
—
A formula is a way to do something or solve a problem that does not change much.
There is no formula for making profit, yet many business people think there is.
The formula for converting from kilograms to pounds is mathx\ \mathrm{kg} \times 2.2/math
—
Infant formula is a powder that you mix with water to make a drink for babies.
of
Preposition
—
Made using.
It is a house of cards.
signature
Noun
—
When a person writes their own name with a pen, they are writing their signature.