$\left(2-a\left(2-a\right)\right)$
$cos^2\left(x\right)+2sen^2\left(x\right)=1$
$-2x+\frac{1}{2}\le\frac{1}{2}$
$\int ( 2 x ^ { 3 } + 3 ) ^ { 2 } d x$
$-7x^4+6x^2+6x+5+-2x^2+2+3x^5$
$3x^2-28x+9$
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