$\int\sec\left(\frac{1}{2}x\right)^4dx$
$x^2-3x-4<0$
$2\left(z-9\right)>-2$
$9x^2-15^2x$
$-24x-74$
$\int\frac{8x-5}{3x^2-5x+2}dx$
$-21\left(-10\right)$
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