$19x-6x^2-10=0$
$\int\left(\frac{x}{x^2+6x+13}\right)dx$
$-5x^2+7x^2-3y^2-x^2$
$\frac{x^3-3x^3-2x+1}{x-2}$
$cot^2\:a\:+\:1\:=\:csc^2\:a$
$62+971$
$25z^3-2z^2-4z^3+8z^2-9+z$
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