$\frac{d^2}{dx^2}-322\left(8+5x\right)e^{-7x}$

$\left[\left(a+b\right)^{\left(2\right)}+\left(a-b\right)^{\left(2\right)}\left(a+b\right)^{\left(2\right)}-\left(a-b\right)^{\left(2\right)}\right]$

$\tan\left(a\right)\cdot\sec^2a-\tan\left(b\right)=\tan^3a$

$\left(x+9\right)-\left(2x+1\right)$

$9x^2-14x-15$

$\frac{5+3x}{4x+5}>1$

$\left(x^8+x^7-x^4-x^3+x^2\right)\left(x^4+x+1\right)$