$1=9+x^2$
$x^2-x+11$
$8y-18$
$\left(29x^3z^7y^4\right)^2-\left(14xm^2y^5\right)^2$
$-14n^2m^3\left(2h^2m^2-3xy-8m^4\right)$
$\cos^45x-\sin^45x=\cos10x$
$2x^2-4x-1$
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