$\frac{d^2}{dx^2}\left(\left(2x+3\right)^5\right)$

$\:\:-\:\left[\:\left(5.604\right)\:-\:\left(7.817\right)\:\right]\:-\:\left[\:\left(13.421\right)\:-\:\left(-35\right)\:\right]\:-\:\left(71\right)\:$

$x^2+7x-15$

$-16-\left(-7\right)$

$3x^4+2x^3-5x^2+7x$

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

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