$8\tan^2-1=3tanx+4$
$\left(-4x^5+8x^4+31x^3-41x^2-60x+36\right)\left(x+2\right)$
$2\sin2x+\cos x=0$
$0+\infty$
$174-2345$
$\left(-3\left(-1\right)\right)^4-63$
$y=-ax^{-4}$
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