$3,4\cdot6,3$
$111\cdot111$
$-16t^2+\frac{128}{s}+68$
$x^2-2x+37$
$\left(x^9-7\right)\left(x^9+6\right)$
$2800\cdot27$
$\frac{1}{sen\left(a\right)cos\left(a\right)}=x$
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