Question

очень надо!!!!!!!!!!!!!!!!

Answer 1

$3) -7x^2y * 19xy^2 = -133x^3y^3\\ 4) (x^{13}x^{26})^3 = (x^{39})^3 = x^{117}\\\ 5)(-7xy^5)^3= -343x^3y^{15}\\ 6) cfrac{(x^5)^6*x^7}{x^{27}} = cfrac{x^{30}*x^7}{x^{27}} =cfrac{x^{37}}{x^{27}} =x^{10}$