$\begin{array}{c}\int ()\,d \\ \int_{()} ()\,d \\ \int_{()} ()\,d \\ \int ()\,d \\ \int_{()} ()\,d \\ \int_{x()} ()\,d 2\\ \frac{d^2()}{d^2}\\ \frac{2}{x}\\ e^2\\ \lim_{2> 5}()\\ \lg ()\\ \langle ()^{}\rangle \\ \left\lfloor\frac{}{2> 5}\right\rfloor \\ 2525()\end{array}$