$5\left(\left(-4\right)+\left(-3\right)\right)+8$
$x^4-61x^2+900$
$a^28a+15$
$y^4\:-\:5y^2-50$
$\frac{\tan\left(y\right)}{\tan\left(y\right)}$
$-5x^2+40x-65=0$
$4x^6+4x^3+4$
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