$350-585$
$\frac{\left(x+5\right)^{2}-\left(x-5\right)^{2}}{5}$
$\left(7x^2+4x-3^2\right)$
$12am2+6a$
$-d-7d$
$\sqrt[5]{-x^{5n}y^{10x}}$
$-207xy^2-53xy^2+206xy^2$
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