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(1D) Perfect squares expansion
Expand and simplify.
$\left(-2y-3\right)^{2}$
$\left(-4x+7\right)^{2}$
$\left(4x-7y\right)^{2}$
$\left(-4-9y\right)^{2}$
$\left(3-8x\right)^{2}$
$\left(-8y-3\right)^{2}$
$\left(2y-7x\right)^{2}$
$\left(-2-7x\right)^{2}$
$\left(7y-5x\right)^{2}$
$\left(5x-2y\right)^{2}$