Let f(x)=2x2+5x−3 , g(x)=x2−4x+2 , and h(x)=−x2+4x−2 . Select all of the expressions that are equivalent to 3x2+x−1 .

g(x)+f(x) g of x plus f of x f(x)−h(x) f of x minus h of x h(x)−f(x) h of x minus f of x g(x)−h(x) g of x minus h of x f(x)+h(x) f of x plus h of x f(x)+g(x)