B – Brackets (), [], {}, which means in an expression the first thing you have to do is the simplification of the brackets. We can remove brackets from an expression by expanding them by multiplications. In mathematics we first simplify the round brackets then the square brackets and lastly the curly one.

O – Of (orders, power and square, cube roots), which means you have to solve all the numbers which have powers and roots.

D – Division (which means you have to perform the division operation)

M – Multiplication (means that you have to perform the multiplication operation)

A – Addition (means that you have to perform the addition operation)

S – Subtract (means that you have to perform the subtraction operation)