Write an expression for the sequence of operations described below. subtract a from \( b \), double the result, then raise what you have to the 3rd power Do not simplify any part of the expression.

The expression for the sequence of operations described can be written as: \((2 \cdot (b - a))^3\). This encapsulates the steps of first subtracting \( a \) from \( b \), then doubling that result, and finally raising the entire output to the third power.