$x^3+\:4x^2-\:x\:-\:4$
$50y^{2-4x^2}$
$\int\frac{2x^4}{\sqrt{3x^5-2}}dx$
$3b+3b+2c^2+2c^2+c^2$
$14,7+10,5+2,1$
$49x^2y^2-4$
$x\cos y=x^2$
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