You claimed that you took calculus. So, you lied.
I am sure that you've been shown this before. Since you lied about taking calculus, I do not expect you to understand what it means. Here:
$$ \Delta t'=\gamma (\Delta t - \frac{v}{c^2} \Delta x)$$
What happens if a clock at rest in the unprimed frame ($$\Delta x=0$$) is viewed from the primed frame?
You do not seem to understand, Lorentz transforms do not map intervals, they map coordinates. The interval is built in.
$$ x'=\gamma ( x - vt)$$
x' and x are coordinates not deltas. you can call t a delta and that part is OK.
Here is a basic fact.
$$\Delta x = v\Delta t$$
Now if have moving observer at x' and want to know what happens for it to move to x when all events begin when origins same, you calculate the distance between the two applying length contraction to x' since it is measured in the moving frame.
$$\Delta x = x - x'/\gamma$$
Substitute this result into
$$\Delta x = v\Delta t$$
$$ x - x'/\gamma= v\Delta t$$
$$ x'/\gamma= x - v\Delta t$$
$$ x'= \gamma(x - v\Delta t)$$
This is Lorentz transform. As you can understand the interval is built in from the coordinates x' and x.
Now the point of this thread is the comparison of the time intervals between the frames for a moving clock at x'<0 to move to the stationary origin.
All math thus far have proved the moving clock beats faster than the clock at the stationary origin.
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