[tex]a) \ d\cdot(-3)\cdot c = -3cd\\\\b) \ 3(-x)(-a) = 3ax\\\\c) \ zy\cdot\frac{1}{2}y = \frac{1}{2}y^{2}z[/tex]
[tex]d) \ 2cd\cdot(-9)\cdotc d = -18cd^{2}\\\\e) \ \frac{1}{4}abb\cdot(-2a) = -\frac{1}{2}a^{2}b^{2}\\\\f) \ \frac{1}{2}a^{2}\cdot4\cdot(-a)\cdot(-5) = 10a^{3}[/tex]
[tex]g) \ 3x^{2}y\cdot(-\frac{1}{6}xy) = -\frac{1}{2}x^{3}y^{2}\\\\h) \ -3(-x)(-x)(-x) = 3x^{3}\\\\i) \ 0,2tsts^{2}\cdot(-15) = -3s^{3}t^{2}[/tex]
