Expand and simplify.
$\left(4x-9\right)^{2}$
$\left(-9x+4y\right)^{2}$
$\left(8-3y\right)^{2}$
$\left(6x+5\right)^{2}$
$\left(4-9x\right)^{2}$
$\left(-4x+7y\right)^{2}$
$\left(3+8y\right)^{2}$
$\left(-2y-7\right)^{2}$
$\left(-6+7y\right)^{2}$
$\left(-3y+2x\right)^{2}$