$16x+15x^2-15$
$\frac{w^2}{36}-\frac{d^6}{25}$
$\left(\frac{8}{5}x^4+\frac{5}{11}\right)\left(\frac{8}{5}x^4+\frac{2}{31}\right)$
$\left(w+9\right)\left(w+3\right)=0$
$6x^2-9xy-27y^2$
$h^2+8h+16$
$-13-\left(5-6-3+8-1+3\right)-3+9$
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