Add these polynomials:
(3a+5b+7c)+(8a-2b-9c)
 

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Add these polynomials;
(3x²+7x+4); (5x²-9x+4);
(11x²-4x-8);(6x²+2x+3)

Subtract (5m-6n+12) from (2m+3n-5)

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(4x+8y+9z-7a+5b)-(4b+5x+7y+3z+2a)

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Subtract the difference of
(3x²-10x+5) and (9x²+3x-7)
from the sum of (6x²-5x+5) and (3x²-9x+16)
 

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