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jsMath ftw \[\sum_i \int_0^1 \nabla N_i \cdot \nabla N_j \det{J} d\xi_1 \dots  d\xi_d \]

Easy Latex $$\sum_i \int_0^1 \nabla N_i \cdot \nabla N_j \det{J} d\xi_1 \dots d\xi_d$$

$$!\sum_i \int_0^1 \nabla N_i \cdot \nabla N_j \det{J} d\xi_1 \dots d\xi_d$$

Testing testing…