Department of Mathematics;
Faculty of Science;
Zagazig University;
Zagazig;
Egypt;
Department of Mathematics;
Faculty of Science;
Taif University;
Taif;
KSA;
Department of Mathematics;
Faculty of Science;
Benghazi University;
Benghazi;
Libya;
Chebyshev; Spectral; Method; Riccati; Differential; Equation; Logistic; Differential; Equation; Multi-Order; ODEs;