Expand and simplify.
$\left(x^2-4x+5\right)\left(2x-3\right)$
$\left(5x-3\right)\left(2+3x-x^2\right)$
$\left(3x-5y\right)\left(x^2+xy-4y^2\right)$
$x\left(x+1\right)\left(x-1\right)$
$-x^2\left(3-x\right)\left(x+3\right)$
$\left(x-1\right)\left(x+2\right)\left(x-3\right)$
$\left(2x-3\right)^2\left(x+4\right)$
$\left(x-2\right)^3$
$\left(3+2x\right)^3$
$\left(x-1\right)\left(x^6+x^5+x^4+x^3+x^2+x+1\right)$
$\left\{\left(x+a\right)+\left(y+1\right)\right\}\left\{\left(x+a\right)-\left(y+1\right)\right\}$