$$x^2+2x-3^2$$

$$\int\left(\frac{1}{x\sqrt{1-9x^2}}\right)dx$$

$$\infty+70$$

$$\frac{5x-4}{2}>-2$$

$$2xy+y^2$$

$$\left(\frac{-5}{4}abcd\right)\left(\frac{-1}{2}b^2c^5\right)\left(-3c^4\right)\left(-a^4\right)$$

$$4x^4+17x^3+10x^2-7x+18\:\:$$