Can you provide some examples of music with a free form structure?

Below are images of the respective passages of which I speak.

“Sheherezade”:

Likewise, Russian composer Nikolai Rimsky-Korsakov's composition “Sheherezade” contains a sequence of musical passages with skeletal framework provided, allowing free-form to both soloist and strings in pizzacato. Rimsky-Korsakov's notation is most fascinating to see..and hear. The passages of which I write take place in Mvt. 2 of this astonishing work.

You found a love potion, and your friend tried to use it on an attractive popular girl, but he accidentally dropped it on the neighbors dog. Now the dog won't stop following him. How would you help him?

Ralph Vaughn-Williams’ timeless, ethereal “The Lark Ascending” begins with a cadenza for solo Violin with quite the duration of free-form allowed by the Composer. Vaughn-Williams' notation is quite interesting to view. Violinist Hilary Hahn best infuses this cadenza with the most favorable tone and technique.

Typically, within a symphonic score, free-form structure is instructed via a Composer's indication of “Cadenza”. In musical terms, a cadenza is an improvised, ornamental passage performed in a “free” rythmic style, typically by a solo performer. To some extent, the musical indication of “a piacere”, (at your pleasure), also allows a performer to abide by the tempo, rhythm and dynamic level of their decision.

“The Lark Ascending”: (the indication “Sur la touche” advises the Violinist to play on the finger board of the instrument).

What can I do when I'm ugly on both outside and inside? What do I do? Cut myself off from the world to make everyones lives better? I'm a monster. I hurt feelings, and I say what was said to me. I feel like I'm nothing but a burden. What do I do?