Simplify:
(2xy + 4yz + 9) - (3yz - 3xy - 1)
xy + yz + 10
-xy + yz
-xy + yz + 10
xy - yz + 10
= 2xy + 4yz + 9 - 3yz + 3xy + 1
= (2xy + 3xy) + (4yz - 3yz) + (9 + 1)
= xy + yz + 10
The sum :2xy+4yz+5xy+3yz-6xy
Simplify 2xy-[4yx-{3xy-(4xy-2xy)}]