answer,gold
"so that x == 1 or x == 2, thus the result is $2*\pi*r$","$2*\pi*r$"
"The answer is $$\sin(x)$$","$$\sin(x)$$"
"After solving, we get $1/2$","$1/2$"
"The final result is $$(a + b)^2$$","$(a + b)^2$"
"Therefore, $$3!$$","$3!$"
"The point coordinates are $(1,2)$","$(1,2)$"