$3a^{5}-2a^{4}-8a^{2}$
$x+x^{-1}=2\:$
$\int\frac{2x-1}{x\left(x^2+6\right)}dx$
$\frac{\cot\left(d\right)+\tan\left(d\right)}{\csc\left(-d\right)}$
$\sqrt{4x^2+3x-10+4}$
$6cos^23x-7cos3x-3=0$
$624\cdot\frac{1}{4}$
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