$$-0,6y \times 2=$$
$-1,2$
$$\frac{\mathrm{d}}{\mathrm{d}y}(-1,2y)$$
$$-1,2y^{1-1}$$
$$-1,2y^{0}$$
$$-1,2$$
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$-\frac{6y}{5}$
$$-1,2y$$