$( 2 x + 4 ) ( x - 2 )$
$a-5\ge-14$
$\lim_{x\to0}\left(\log_x\left(tanx\right)\right)$
$11a=-132$
$cos^4\left(x\right)-2cos^2\left(x\right)sin^2\left(x\right)+sin^4\left(x\right)+sin^2\left(2x\right)$
$\frac{0}{-15}$
$\int u\sqrt{\left(1-u^2\right)}du$
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