multiplique os monômios abaixo:

[tex]a^{3} . 7a^{4} =\\\\5x^{2} . 2x^{4} =\\\\10ab . 9b^{2} =\\\\3y^{7} . 15y =\\\\-bc . 3 =\\\\-2xy^{3} - 10x^{2} y^{6} =[/tex]