$\frac{\sec^2\left(x\right)-1\:+\left(\sec\left(x\right)+\cos\left(x\right)\right)\sec\left(x\right)}{\sec\left(x\right)\tan\left(x\right)}=0$

$3x^2+5=18x$

$\left(x^2-y^8\right)^2$

$\int\frac{-2x}{\left(x^3+x^2+x+1\right)}dx$

$\left(x+1\right)^3x-2\left(x+1\right)^2x^2+x^3\left(x+1\right)$

$\int x^3\cos\left(x^4\:+\:2\right)dx$

$5y+12+y>84$