Invalid operands to binary expression C++ [duplicate]

I'm working on the C++ project where I have to overload operands in a generic class (template class).

So, I have a sample class like this:

template <class T>
class SomeClass {
private:
    T variable;
public:
    explicit SomeClass(T variable) : variable(variable) {}

    SomeClass operator + (SomeClass const &someClass) {
        return SomeClass<T>(this->variable + someClass.variable);
    }
};

And main method like this:

int main() {
    SomeClass<int>* obj1 = new SomeClass<int>(5);
    SomeClass<int>* obj2 = new SomeClass<int>(7);

    SomeClass<int>* result = obj1 + obj2;

    return 0;
}

If I hover the "+" sign, I'm seeing this error message:

Invalid operands to binary expression ('SomeClass<int> *' and 'SomeClass<int> *')

What is the cause of this error?

If I don't use pointers, everything works fine. (when I write smth like this):

int main() {
    SomeClass<int> obj1(5);
    SomeClass<int> obj2(7);

    SomeClass<int> result = obj1 + obj2;

    return 0;
}

Note: I have to use pointers in my app, so the last code snippet isn't viable for me.