$5x^2+2x-3=0$
$cosx=\frac{2}{3}\:$
$-495-\left(+65\right)$
$\int\frac{x^4}{sec\left(5x^5+2\right)}dx$
$14:-2$
$\cos\left(t\right)x\cos\left(t\right)$
$1,7-0,5$
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