“Proposal of A New Elements for the Mathematica Program to Solve Partial Differential Equations”. 2021. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 32 (2): 283-91. https://doi.org/10.55562/jrucs.v32i2.341.