$$\left(3z-5\right)\left(7z+1\right)$$

$$2x-4<x+3$$

$$\int\left(3x-5\right)^{-1}dx$$

$$4x^2-3x-1;\:x=1$$

$$\int x\left(\sqrt{5x-1}\right)dx$$

$$\int5\sin\left(x\right)\tan\left(x\right)dx$$

$$\lim_{x\to-\infty}\:\frac{2^{-x}}{2^x}$$