The image you uploaded contains a mathematical expression that appears to be a limit and an integral. Here's a breakdown of the expression:

$L = \lim_{B \to \infty} \int_{0}^{\frac{\pi}{2}} \left( \frac{\sin(2027 - 2026)}{360} \right) \left( \frac{\sin(258x)}{x} \right)^2 dx$

To give a better understanding, this is a combination of a limit as $B \to \infty$ and an integral from 0 to $\frac{\pi}{2}$. The function involves trigonometric functions and a rational term inside the integral.

Let me know if you need further clarification or if you'd like to proceed with the steps to solve or analyze the expression. Would you like to dive deeper into the details of this integral?