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Tohaina

\frac{\mathrm{d}}{\mathrm{d}m}(28m^{2})
Whakareatia te m ki te m, ka m^{2}.
2\times 28m^{2-1}
Ko te pārōnaki o ax^{n} ko nax^{n-1}.
56m^{2-1}
Whakareatia 2 ki te 28.
56m^{1}
Tango 1 mai i 2.
56m
Mō tētahi kupu t, t^{1}=t.
28m^{2}
Whakareatia te m ki te m, ka m^{2}.