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2. 14b - 15i - 45j + 64k
3. -6 - 13x + 23y + 35z
4. -2 - 15m + 62n
5. 4 + 4x
semoga benar.......
2. -15i + 14b + 64k -45j
3. -13x + 35z + 23y -6
4. -4x-4