Math

(7r^2 +r3 -3)+(6r^3 -3r^2 +10)+(2+r^2)

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(7r^2 +r3 -3)+(6r^3 -3r^2 +10)+(2+r^2)

7r^2 +r3 -3 +6r^3 -3r^2 +10 +2+r^2

+r^3+6r^3 7r^2-3r^2+r^2 -3+10+2

7r^3 +5r^2 +9