$-\frac{3}{2}x^2-\frac{1}{3}x$
$-x^3+6x^2-11x+6$
$25d^2\:20d\:+\:4$
$8a^2-64a$
$\frac{-x^2+4x+9}{-x^2-16}$
$\sqrt{2^n}$
$-2\cdot39$
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