Measure 4 from Ludwig van Beethoven's Piano Sonata No. 8 (Pathetique), Op. 13. This example demonstrates nonuplet 128th notes (semihemidemisemiquavers), 64th notes (hemidemisemiquavers), and one 32nd note (demisemiquaver).
Melodic upper leading-tone, the subdominant/degree four (E♭) as auxiliary to the mediant/degree three (D) (in C this would be F and E♮). From the opening to Brahms Op. 56.