$n^4-20n^2+64$
$4c^2-12c+9$
$\cosh\left(2x\right)=2\sinh^2\left(x\right)+1$
$\left(x^3y^4-2\right)^2$
$\tan^2\left(\theta\right)+\tan\left(\theta\right)=0$
$\left(a^5\right)\left(-\frac{b}{2}\right)^5$
$615+450$
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