3.
[tex]a) \ 37a\cdot2\frac{1}{3}c=37a\cdot\frac{7}{3}c = \frac{259}{3}ac = 86\frac{1}{3}ac\\\\b) \ 14\frac{2}{3}bx\cdot6x = \frac{44\cdot6}{3}bx^{2} = 44\cdot2bx^{2} = 88bx^{2}\\\\c) \ 7\frac{5}{8}ax^{2}\cdot13,2xa = 7,625ax^{2}\cdot13,2xa = 100,65a^{2}x^{3}\\\\d) \ 4,2k\cdot2\frac{1}{3}km\cdot\frac{k}{p} = \frac{42}{10}k\cdot\frac{7}{3}km\cdot\frac{k}{p} = \frac{21\cdot7}{5\cdot3}\frac{k^{3}m}{p} = \frac{49}{5}\frac{k^{3}m}{p} = 9,8\frac{k^{3}m}{p}[/tex]
4.
[tex]a) \ x^{7}\cdot x^{5} = x^{7+5} = x^{12}\\\\b) \ x^{7}\cdot x^{5}\cdot x^{3} =x^{7+5+3} = x^{15}\\\\c) \ x^{6}\cdot y^{5}\cdot x^{9}\cdot y^{4} =x^{6+9}\cdot y^{5+4} = x^{15}y^{9}\\\\d) \ \frac{x^{3}\cdot x^{12}}{x^{4}\cdot x^{5}}=\frac{x^{3+12}}{x^{4+5}} = \frac{x^{15}}{x^{9}} = x^{15-9} = x^{6}[/tex]
