$$-\sin+3=\sin-4$$

$$\left(-10+5-1\right)-\left(-4-6\right)$$

$$7xyz+42x^2yz$$

$$\int\left(\sec\left(6x\right)-\tan\left(6x\right)\right)^2dx$$

$$-8x^4+6x^3+2x^2+x-1x^2+1$$

$$\lim_{x\to\infty}\:3x-\sqrt{x^2+x-1}$$

$$\int\cot^2\left(x\right)\sin^2\left(x\right)dx$$