I NEED HELP ASAP! Which is the best description of the equivalency of the two expressions?

Expression 1
Expression 2
5 x squared minus 2 x minus 4 + 6 x + 3
6 x squared minus 6 x + 6 minus x squared + 10 x minus 7
The two expressions are not equivalent because when x = 2, the two expressions do not have the same value.
The two expressions are not equivalent because when they are simplified, they do not have the same coefficients for the x squared and x terms.
They are equivalent because the sum of the constants is the same in both expressions.
They are equivalent because when x = 2, the two expressions have the same value.