$\cos^260\:mas\:\sec^260$
$9x^2-12x+36$
$\int\:e^{6x+1}dx$
$x^2+4x+5<0$
$\sqrt{2}b^{3}x-\sqrt{2}bx^{2}$
$x^2+2x^2-41x-25=17$
$x^2+3x-72=0$
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