$4\int\left(\sec^2x-1\right)\sec xdx$
$\frac{4x^4-5x^3+4x^1-5}{3-2x}$
$11-8\left[15-3-12\left(+8-3+5\right)\right]$
$\left(x^2-9\right)+\left(x^2+9\right)$
$4\left(x+5\right)-2x+34$
$-3\left(x+1\right)\ge-x-6$
$-2x^2+9x+5$
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