$$10\left(3+-15\right)$$

$$\cos\left(x\right)\csc\left(x\right)-\sin\left(x\right)\csc\left(x\right)\cot\left(x\right)$$

$$4xy-2x^2y=2\left(x-xy\right)$$

$$\frac{1}{2}x^2\arcsin\:\left(x\right)-\frac{1}{4}\left(\arcsin\:\left(x\right)-\frac{1}{2}\sin\:\left(2\arcsin\:\left(x\right)\right)\right)+c$$

$$\left(ce+y\right)\left(2-\sqrt{y}\right)$$

$$\left(\frac{-a}{\sqrt{a^2+c^2}}\left(\sin\left(x\right)\right)\left(-\sin\left(x\right)\right)\right)$$

$$8-\left(1+\left(-11\right)\right)$$