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b. 9b-3
c. 5x^2 + 4x + 8
d. 2p^3-p^2+11p-15
e. 5x^2y + 6xy^2 - xy - 3x - 4y
2. a. x+2+2x-10 = 3x-8
b. 4x-4y+3x-7y = 7x-11y
c. dst caranya sama
3. a. (2x+3)+(x+y+z) = 2x+3+x+y+z = 3x+y+z+3
b. (2x+3)+(x+y+z)+2(5x-2y+3) = 2x+3+x+y+z+10x-4y+6 = 13x-3y+z+9
c. dst caranya sama..