Do these equations make any sense?

$E = mc²$

$E = h.f$

$ f = \frac{1}{\Delta t} $

f = Frequency

$$ c² = \frac{d²}{t²} $$

$$ c² = \frac{d²}{t} * \frac{1}{t} $$

if $\Delta t$ is equal to $t$, then we have E=mc², if different, we have $E =m . \frac{d²}{t} . f$

Equaling both Energy Equations:

$$h.f = m.c²$$

$$h.f = m . \frac{d²}{t} . f$$

$$h = m.\frac{d²}{t}$$

$h = d².\frac{m}{t}$ => happens to be the same units of Plancks Constant.

$m²\frac{kg}{s}$

Throwing "h" again in the formula of E = h.f:

$$ E = d².\frac{m}{t}.f$$

OR

$$ E = m.\frac{d²}{t} . f$$

That could be also seen as:

$$ E = m. \frac{d²}{t} . \frac{1}{\Delta t} $$

IF, $\Delta t$ is equal to t:

$$E = m.\frac{d²}{t²}$$

and since $v² = \frac{d²}{t²}$ and $c² = v²$:

$$ E = mc² $$

Is there something wrong with these equations?