-3×2-x-10 and 10×2+x-10

Add the expressions.

-3×2-x-10+10×2+x-10

Add -x and x.

-3×2-10+10×2+0-10

Add -3×2-10+10×2 and 0.

-3×2-10+10×2-10

-3×2-10+10×2-10

Add -3×2 and 10×2.

7×2-10-10

Subtract 10 from -10.

7×2-20

Add -3x^2-x-10 and 10x^2+x-10

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# Add -3x^2-x-10 and 10x^2+x-10

-3×2-x-10 and 10×2+x-10

Add the expressions.

-3×2-x-10+10×2+x-10

Add -x and x.

-3×2-10+10×2+0-10

Add -3×2-10+10×2 and 0.

-3×2-10+10×2-10

-3×2-10+10×2-10

Add -3×2 and 10×2.

7×2-10-10

Subtract 10 from -10.

7×2-20

Add -3x^2-x-10 and 10x^2+x-10