$2\cdot256$
$\left(-3\right)^{2}\cdot2^{4}$
$\left(8x^2y\right)^3$
$245+-680+135+-791+456+462+231+-564+680$
$\frac{\sin30}{\cos30}$
$63+63+63+63$
$x^2+16+16$
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