$x^2-6x+25=11$
$-90-120$
$100x^2+1000x+2500$
$\left(4x-y-2z\right)^2$
$\frac{d^2}{dx^2}\left(\frac{3}{8x^4}\right)$
$\left(x^2y^4z\right)^3$
$8x\:+\:12y\:-\:15x\:+\:18x\:-15y\:+\:x$
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