Brackets, then exponents, then × and ÷ left to right, then + and − left to right. Evaluate each expression — practice mode walks through every step.
How many numbers appear in each expression — 3 terms means 2 operations, like 3 + 4 × 2.
The biggest number written in the expression. With decimals it bounds the whole part (10 allows up to 9.9).
Exponents from 2 up to this value appear on one or two of the numbers.