$x^2-50x+276=0$
$4x^2-20+25$
$2x^4y^2z^2;x=3,y=-2,z=1$
$\sqrt{\sqrt{x^{2}y^{2}}-10}$
$1.9\:-\:8\:-\:5\:=\:$
$64x^3y^6-216z^9$
$\frac{dy}{dx}=\frac{4tany}{secx}$
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