Question

integration
$(1 + 2x + x)$

Answer 1

integration of
$1 + x + 2x \\ is \\ x + ( {x}^{2} \div 2) + {x}^{2}$

Answer 2

Integration of (1+2x+x) is
(2 + 2x^2 + x^2)/2 = (2+3x^2)/2
OR
$(2+ 2{x}^{2} + {x}^{2} ) \div 2$