The value of $(2+3)^{2}-\left(2^{2}+3^{2}\right)$ is
(A) 50
(B) 12
(C) 15
(D) -15
(E) -12
Following the correct order of operations, we get $(2+3)^{2}-\left(2^{2}+3^{2}\right)=5^{2}-(4+9)=25-13=12$.

ANSWER: $(\mathrm{B})$