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(1D) Perfect squares expansion
Expand and simplify.
$\left(-2y-5\right)^{2}$
$\left(8-7y\right)^{2}$
$\left(4y+9\right)^{2}$
$\left(3x-5y\right)^{2}$
$\left(3-7y\right)^{2}$
$\left(5+3y\right)^{2}$
$\left(3+7x\right)^{2}$
$\left(5y+6\right)^{2}$
$\left(7y-4x\right)^{2}$
$\left(3x+4\right)^{2}$