$\left(-47\right)-\left(-121\right)+96$
$x^4+17x^{2-60}$
$z^25-3^2y$
$2x^2-2x-8\:=\:-4$
$\frac{u^4-u+2}{u^2-1}$
$-x^2;\:x=-2$
$5a^2+a^2+2a^2$
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