$$\csc x-\cos x\csc x=\sin x$$

$$\int e^{1-x}dx$$

$$\sec^2\theta\:-6\sec\theta\:+8=0$$

$$3+\left(-0.2\right)-15\frac{1}{4}$$

$$\log\left(x-3\right)=\log\left(17-4x\right)$$

$$8y+5x-3y+7-2x$$

$$2\sin\left(x\right)-6\tanh\left(y\right)$$