$$3\cos^2+\sin^2=3$$

$$1-\frac{x}{3}$$

$$2x-1>4x+2$$

$$\left(1+\cos\left(b\right)\right)\left(1-\cos\left(b\right)\right)=\sin^2\left(b\right)$$

$$3x^2-18x-81=-6$$

$$\int2x\left(x^2+5\right)^{10}dx$$

$$sec\left(x\right)-tan\left(x\right)=\frac{\cos\left(x\right)}{1+\sin\left(x\right)}$$