ohm⇒ \Omega [Ex: ==> {\Omega}_R]
rho⇒ \rho []
Integral⇒ \int_lower^higher
[Ex: ⇒ \int_{\Omega_R}d^2r1]
root⇒ \sqrt{figures} [Ex: ⇒ \sqrt{a^2-x^2}]
belongs to⇒ \in [Ex: ⇒ \in]
Universal Set⇒ \mathbb R [Ex: ⇒ {\mathbb R}^2]
⇒ \matrix{x_1&y_1&z_1@x_2&y_2&z_2@x_3&y_3&z_3}
to be continued......
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