Odpowiedź :
a)
[tex](4 - 2x) - (7x - 1) = \\ = 4 - 2x - 7x + 1 = \\ = - 9x + 5[/tex]
b)
[tex] - 2x(8 - x) - 5( {x}^{2} + 3x) = \\ = - 16x + 2 {x}^{2} - 5 {x}^{2} - 15x = \\ = - 31x - 3 {x}^{2} [/tex]
c)
[tex](4y - 3)(y - 2) - 2y(4 - 2y) = \\ = 4 {y}^{2} - 8y - 3y + 6 - 8y + 4 {y}^{2} = \\ = 8 {y}^{2} - 19y + 6[/tex]