$\frac{-4x^4+20x^3-24x^2-2}{-2x^2+2x+1}$
$tanx=5,6$
$\int-25cos\left(5x\right)^3sen\left(5x\right)dx$
$-3\cdot mn+0$
$x ^ { 2 } - 11 x = - 30$
$-3x-2>3x+8$
$6a^3-4a^2b+10ab^3$
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