Some difficult modern piano songs include "Rhapsody in Blue" by George Gershwin, "La Campanella" by Franz Liszt, and "Piano Sonata No. 2" by Samuel Barber. These pieces are challenging due to their complex rhythms, intricate melodies, and demanding technical skills required to perform them. Additionally, "Etude Op. 10, No. 4" by Frédéric Chopin and "Piano Concerto No. 3" by Sergei Prokofiev are also considered difficult modern piano pieces due to their virtuosic passages and advanced musical techniques. **

Very difficult derivations can be challenging, but they are not impossible. With dedication, practice, and a solid understanding of the underlying concepts, even the most difficult derivations can be tackled successfully. It may require more time and effort, but breaking down the problem into smaller, manageable steps can make it more approachable. Ultimately, the difficulty of a derivation is subjective and varies from person to person. **

Very difficult derivatives can be challenging for many individuals due to their complex mathematical nature and the need for a deep understanding of calculus. However, with sufficient practice, study, and guidance, even the most difficult derivatives can be mastered. It ultimately depends on the individual's level of preparation, mathematical background, and willingness to put in the effort to understand and solve these complex problems. **

In our modern society, finding a girlfriend can be both easier and more difficult. With the rise of technology and dating apps, it is easier to connect with potential partners. However, the fast-paced nature of modern life and the prevalence of casual dating can make it harder to find a meaningful and lasting relationship. Additionally, societal pressures and expectations can also make it more challenging to navigate the dating world. Ultimately, the difficulty of finding a girlfriend in our modern society depends on individual circumstances and experiences. **

I find this coffee table to be both modern and stylish. Its sleek design and clean lines give it a modern look, while the use of high-quality materials and attention to detail make it stylish. The combination of these elements makes it a versatile piece that can fit into a variety of home decor styles. **

The difficulty of the most difficult math problem ever is subjective and can vary from person to person. Some may find it extremely challenging, while others may find it more manageable. However, it is generally agreed that the most difficult math problems often require a deep understanding of advanced mathematical concepts and techniques, as well as creative and innovative thinking to solve. These problems can be so challenging that they may take years or even decades for mathematicians to come up with a solution. **

Tölt can be difficult to master for both the horse and the rider. It requires a specific balance, coordination, and timing to achieve the smooth, four-beat gait that is characteristic of tölt. Additionally, not all horses are able to perform tölt naturally, so it may require training and patience to develop this gait. However, with proper instruction and practice, many riders and horses can learn to perform tölt effectively. **

Surfing can be difficult for beginners as it requires balance, strength, and coordination to paddle, stand up, and ride the waves. It also requires an understanding of the ocean and its currents. However, with practice and dedication, many people are able to learn and enjoy the sport. It's important to start with proper instruction and to be patient with yourself as you learn. **