$$13\times(-5)\alpha(-3)$$
$195\alpha $
$$-65\alpha \left(-3\right)$$
$$195\alpha $$
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$195$
$$\frac{\mathrm{d}}{\mathrm{d}\alpha }(-65\alpha \left(-3\right))$$
$$\frac{\mathrm{d}}{\mathrm{d}\alpha }(195\alpha )$$
$$195\alpha ^{1-1}$$
$$195\alpha ^{0}$$
$$195\times 1$$
$$195$$
