$\left(x^2-y^2\right)^2=x^2+y^2$

$\left(x^2-y^2\right)^2=x^2+y^2$

$\left(x^2+y\right)^2=x^2-y^2$

$x^2-y=\left(x+y^2\right)^2$

$e^{\pi / 3}+e^\pi$

$e^{\pi / 3}-e^\pi$

$e^\pi-e^{\pi / 3}$

$\frac{1}{2}\left(e^{\pi / 3}-e^\pi\right)$

gravitational force

weak force

electromagnetic force

strong force

$\left[\mathrm{MLT}^{-1}\right]$

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-1}\right]$

$\left[\mathrm{ML}^2 \mathrm{~T}^{-1}\right]$

$\left[\mathrm{ML}^{-1} \mathrm{~T}^{-2}\right]$