$\sqrt[3]{64a^3k}$
$9x^2+126x+49$
$9 x ^ { 2 } + 16 y ^ { 2 } + 24 x y$
$\int_0^{20}xdx$
$-17-\left(1+7\right)+-11$
$-9v+1-7w+13+4w-v$
$x\:x\:5x$
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