Question

То, что сможете))))

Answer 1

1
3/19+7/19=10/19
5/11-7/9=45/99-77/99=-32/99
1 2/3+2 3/5=1 10/15+2 9/15=3 19/15=4 4/15
3/40+1/10=3/40+4/40=7/40
7/24-5/36=21/72-10/72=11/72
2
$21x^5y^6*2y^3=42x^5y^9$
$3a^4b^5*6a^2b=18a^6b^6$
$(4a^6-b)*ab=4a^7b-ab^2$
$2xy^3(x+y)=2x^2y^3+2xy^4$
$27a^3b^8:(3ab^2)=9a^2b^6$
$(a-3b)(3b+a)=a^2-9b^2$