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Може хтось сказати чи правельний розв'язок ? \[\frac{\text{d}y}{\text{d}x}=\frac{3(x-2)^2\times \arctan(7x-1)}{2\sqrt{(x-2)^{3}}}+\frac{7\sqrt{(x-2)^{3}}}{1+(7x-1)^{2}}\]