Practice problem
Simplify the expression by combining like terms. 3x3+x2+6x+6x2+9+5x3+7+7x3x^3+x^2+6x+6x^2+9+5x^3+7+7x3x3+x2+6x+6x2+9+5x3+7+7x
9x3+6x2+14x+99x^3+6x^2+14x+99x3+6x2+14x+9
15x3+6x2+42x+6315x^3+6x^2+42x+6315x3+6x2+42x+63
8x6+7x4+13x2+168x^6+7x^4+13x^2+168x6+7x4+13x2+16
8x3+7x2+13x+168x^3+7x^2+13x+168x3+7x2+13x+16
Type a concept, like “slope” or “photosynthesis”.
