Pochodna funkcji ctg^3*x/3

$f\left(c, g, t, x\right) =$	$\dfrac{c{g}^{3}tx}{3}$
$\dfrac{\mathrm{d}\left(f\left(c, g, t, x\right)\right)}{\mathrm{d}x} =$	$\class{steps-node}{\cssId{steps-node-1}{\tfrac{\mathrm{d}}{\mathrm{d}x}\kern-.25em\left(\dfrac{c{g}^{3}tx}{3}\right)}}$ $=\class{steps-node}{\cssId{steps-node-2}{\dfrac{c{g}^{3}t}{3}}}$

$f\left(c, g, t, x\right) =$

$\dfrac{c{g}^{3}tx}{3}$

$\dfrac{\mathrm{d}\left(f\left(c, g, t, x\right)\right)}{\mathrm{d}x} =$

$\class{steps-node}{\cssId{steps-node-1}{\tfrac{\mathrm{d}}{\mathrm{d}x}\kern-.25em\left(\dfrac{c{g}^{3}tx}{3}\right)}}$

$=\class{steps-node}{\cssId{steps-node-2}{\dfrac{c{g}^{3}t}{3}}}$