please help me get the correct code in C++ quickly and please show your output

run time has to be less than 30 seconds and please dont change code just add to calculator.cpp and .hpp

test.cpp

calculator.cpp

calculator.hpp

Your task is to create a calculator library that allows the user to construct a graph of integer computations and evaluate them. Read through test.cpp to see how the library needs toJbe used, and implement it accordingly. "include "../src/calculator.hpp" I/ Test al1 functionality of the calculator, which is: If - Lit(i) to create literal expressions II - foo->Add(bar), foo->Sub(bar), foo->Mul(bar) to perform operations on two expressions II - foo->tostring() and foo->simplify() to display and evaluate calculator expressions TEST_CASE("Testing function - SumNumbers") \{ auto eq = [] (auto e, std: :string before, std::string after) \{ II Ensure the string representation matches expected value REQUIRE(e->toString() = before); // Ensure the string represtation after simplication matches expected value REQUIRE(e->simplify() ->tostring() = after); I/ simplify() should NOT change the original value REQUIRE(e->tostring() = before); 3; SECTION("testLiterals") \{ eq(Lit(2), "2", "2"); eq(Lit(-1), "-1", "-1"); SECTION("testadding") eq ( Lit(2) Add (Lit(3)),"(2+3),"5); eq ( Lit (1)Add(Lit(2))>Add(Lit(3)),"((1+2)+3)n,"6"); test.cpp calculator.cpp calculator.hpp \#include "calculator.hpp" II Insert code here