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Expand and simplify.

$\left(5y-7x\right)^{2}$

$\left(3x+2\right)^{2}$

$\left(9x-4\right)^{2}$

$\left(-4y+3\right)^{2}$

$\left(5+7x\right)^{2}$

$\left(2y+5\right)^{2}$

$\left(3y-2\right)^{2}$

$\left(-3x-7y\right)^{2}$

$\left(3x-4\right)^{2}$

$\left(3+8y\right)^{2}$