Subtract the sum of `(8a - 6a^(2) + 9)` and `(-10a - 8 + 8a^(2))` from -3

Subtract the sum of 10m - 8n + 6p^(2) "and" - 7m - 4n + 12p^(2) from the sum 2m - 4n + 6p^(2) "and" m-8n + 12p^(2) .

Subtract (+8) from (-8)

Subtract (+8) from (-8)

Subtract the sum of 5x - 4y + 6z and -8x + y - 2z from the sum of 12x - y + 3z and -3x + 5y - 8z

Subtract the sum of -8 and -28 from the sum of -13 and 31.

Subtract the sum of -8 and -28 from the sum of -13 and 31.