$ \Phi =\frac{dQ}{dt} $
$$ \Phi =\frac{dQ}{dt} $$
$$M=\int_{0}^{\infty}x^{3}dx$$
$$E=\lim_{x\rightarrow 0}\Delta helexy22 $$
$$M=\begin{bmatrix}
1 & 2& 3 & 4 \\
5 &6 & 7 & 8 \\
9 & 10& 11 & 12 \\
13 & 14& 15 & 16
\end{bmatrix}$$
