\[ (8a + 4b + 2c + d) - (a + b + c + d) = 15 - 4 \] - AMAZONAWS 📅 March 6, 2026 👤 scraface Mar 06, 2026
![\[ (8a + 4b + 2c + d) - (a + b + c + d) = 15 - 4 \]](https://soloferat.biz.id/images/-8a--4b--2c--d---a--b--c--d--15---4-.jpg)
