Question

Решите пожалуйста все!!!!!!!!!
Срочно !!!!!!!!!

Answer 1

$10x-8xy-3xy=10x-11xy\\3x^{4}-5x+7x-8x^{4}=-5x^{4}+2x\\\\5x*8y*(-7x^{2})+(-6x)*3y^{2}=-280x^{3}y-18xy^{2}\\5a^{2}+3a*7-5a^{2}-3a^{2}+7a-11=-3a^2+28a-11\\6a^{2}b-5ab^{2}+5a^{3}+2ab^{2}-8a^{3}-3a^{2}b=3a^{2}b-3ab^{2}-a^{3}\\\\8x*0.5x^{3}=4x^{4}\\2ab*6b*5a^{2}b=60a^{3}b^{3}\\\frac{3}{8} a^{4}b^{5}c^{6}*(-\frac{2}{9} ab^{3})^{3}=(-\frac{8}{729} a^{3}b^{9})*\frac{3}{8} a^{4}b^{5}c^{6}=-\frac{24}{5832} a^{7}b^{14}c^{6}=-\frac{1}{243}a^{7}b^{14}c^{6}\\ 16x^{4}*(-1,5x^{2})^{3}=-3,375x^{6}*16x^{4}=54x^{10}$