1. $\displaystyle{\frac{e^{-\sqrt{x}} \left(\sqrt[5]{x}+\sin \left(\frac{\pi x}{2}\right)\right)}{\sqrt{\left| \cos (\pi x)+1\right| }}}$
2. $\displaystyle{\ln\left(n x - 1\right) {\sum_{k=1}^{n} \frac{\sqrt{e^{-k x} + x^{k-1}}} {\cos \ k x + \sin \ k x}}}$