1.\:\:\frac{d}{dx}(x\sin(x)+\cos(x))
2.\:\:\frac{d}{dx}(\frac{\tan(x)}{\pi x})
3.\:\:\frac{d}{dx}(\frac{\sin(x)+1}{\cos(x)-1})
4.\:\:\frac{d}{dx}(\pi\cot(x))
5.\:\:\frac{d}{dx}(\tan(x)\sin(x))
6.\:\:\frac{d}{dx}(4\sin(x))
7.\:\:\frac{d}{dx}(\tan(x)-x)
8.\:\:\frac{d}{dx}(\pi\csc(x))
9.\:\:\frac{d}{dx}(\frac{\sin(x)}{2x})
10.\:\:\frac{d}{dx}(\cos(x)\sin(x))