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$$\large{\displaylines{\normalsize\begin{pmatrix} a_{11} & \cdots & a_{1j} & \cdots & a_{1n}\\ \vdots & \ddots & \vdots & \ddots & \vdots\\ a_{i1} & \cdots & a_{ij} & \cdots & a_{in}\\ \vdots & \ddots & \vdots & \ddots & \vdots\\ a_{m1} & \cdots & a_{mj} & \cdots & a_{mn} \end{pmatrix}}}$$

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