[tex]a) \ -2a+12a-33a-54a = -77a\\\\\\b) \ -(-2x+\frac{2}{5})+(5x-\frac{3}{5})+34-\frac{1}{10} = 2x-\frac{2}{5}+5x-\frac{3}{5}+34x-\frac{1}{10} =41x-\frac{5}{5}-\frac{1}{10} =\\\\= 41x-1-\frac{1}{10} = -41x-1\frac{1}{10}[/tex]
[tex]c) \ -4(3,4y+4x) + 5(2,1x-5,7y) =-13,6y - 16x + 10,5x-28,5y =\\\\= -5,5x -42,1y[/tex]
[tex]d) \ (-12a+36):(-\frac{6}{7}) =(-12a+36)\cdot(-\frac{7}{6}) = -12a\cdot(-\frac{7}{6}) + 36\cdot(-\frac{7}{6}) = 14a-42[/tex]
[tex]e) \ \frac{-(64x+12)}{4} =\frac{-4(16x+3)}{4} = -(16x+3) = -16x-3[/tex]
