$a=21,b=14,\beta\:=100^\circ\:$
$9\:+\:16u\:-\:31$
$\left(3x^4+5x^3-2^2+x-7\right)+\left(8x^3-6x^2-3\right)$
$\int_2^4xarcsec\left(x\right)dx$
$5\sqrt{98}-3\sqrt{18}$
$9x^6-60x^3y^4+100y^8$
$3x+\:2<-4$
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