To change (something) from a smaller form and/or size to a larger one; to spread out or lay open.
To increase the extent, number, volume or scope of (something).
To express (something) at length and/or in detail.
To rewrite (an expression) as a longer, yet equivalent sum of terms.
(of an expression) To become, by rewriting, a longer, yet equivalent sum of terms.
To multiply both the numerator and the denominator of a fraction by the same natural number yielding a fraction of equal value
To change from a smaller form/size to a larger one.
To increase in extent, number, volume or scope.
To speak or write at length or in detail.
To feel generous or optimistic.