$4x^2+7x-11$
$\left(x^3+2x\right)^4$
$81a^6+36-108a^3$
$250+70x>1200$
$\left(\frac{1}{x\cdot senx}-\frac{1}{x^2}\right)$
$-1024+-256$
$\sqrt[15]{1}$
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