Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$7xy+5yz-3zx+4yz+9zx-4y+(-xz+5x-2xy)$$

Answer

5*x*y+9*y*z+5*x*z-4*y+5*x

Solution


Remove parentheses.
\[7xy+5yz-3zx+4yz+9zx-4y-xz+5x-2xy\]
Collect like terms.
\[(7xy-2xy)+(5yz+4yz)+(-3xz+9xz-xz)-4y+5x\]
Simplify.
\[5xy+9yz+5xz-4y+5x\]
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