$27x^6-8y^3$
$\cos\left(x\right)^2+\cos2x\cdot\cos x=0$
$4d^2=108$
$5x^3-60x$
$-\left(3+h\right)^2$
$6sin^2x-3sinx=0$
$f\left(x\right)=e^{x^3}^{+2x}$
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