$x\:.\sqrt{x^2+1}+x$
$9x^2-12x-5$
$-1-1.9909$
$h\left(x\right)=e^{x+1}-1$
$xy-y=2x^2y$
$\left(2x^2\:y^5\right)^2$
$6x+6y+z+6w=279$
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