$\left(x^2-9\right)\left(x^4+9x^2+81\right)$

$6\sec\left(x\right)+5=8\sec\left(x\right)+2$

$\sin\left(x\right)^2+\frac{1}{2}\sin\left(x\right)=0$

$\left(6x^2y^5z\right)\left(-8x^2y^4\right)$

$\int\frac{2-v}{v}dv$

$\int10\arcsin\left(6x\right)dx$

$\left(81z^2-1\right)$