$\lim_{x\to\frac{\pi}{2}}\left(4cos\left(7x\right)sec\left(5x\right)\right)$
$\left(-1.0001\right)^2-5\left(-1.0001\right)$
$8,01+24,192$
$\left(3x^2-2\right)\left(3x^2-7\right)$
$1x^2-14x+49$
$3+\frac{12}{2}$
$\frac{dy}{dx}-y^2-y=0$
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