Bonjour pouvez vous m'aider svp ?

Réduire si possible les expressions suivantes :

[tex] m = 4x - 8x + 5 \\m = [/tex]
[tex]n = - 3x + 7x + 10x = \\ n = [/tex]
[tex]o = 7 - 2x + 4x = \\ o = [/tex]
[tex]p = - {5x}^{2} - {7x}^{2} + {3x}^{2} \\ p = [/tex]
[tex]q = 3x + 5 + {4x}^{2} \\ q = [/tex]
[tex]r = - 10x - 3x - 4x \\ r = [/tex]
[tex]s = 5x + 3 + 2x + 6 \\ s = [/tex]
[tex]t = { - 5x}^{2} + 3 + {8x}^{2} - 9 \\ m = [/tex]
[tex]u = - 4x - 2 - 8x - 3 \\ u = [/tex]
[tex]v = {2x}^{2} - 7x + 4x \\ v = [/tex]
[tex]w = { - 3}^{2} - {7x}^{2} + {2x}^{2} \\ w = [/tex]
[tex]x = {2x}^{2} - 8x - {3x}^{2} + 5x \\ x = [/tex]
[tex]y = - 5x + 3 - 1x - 2 \\ y = [/tex]
[tex]z = {6x}^{2} + 2x - x + {x}^{2} + 0x - {4x}^{2} \\ z = [/tex]
​