ENHANCING LQ45 STOCK PRICE FORECASTING USING LSTM MODEL - Sinaga, Marlina Setia; Iskandar, Said; Manullang, Sudianto; Arnita, Arnita; Marpaung, Faridawaty; Buulolo, Fatizanolo (BAREKENG: Jurnal Ilmu Matematika dan Terapan, 2025)