So if i had 100 eGLDs staked , i will every week receive 150 MEX .So for first year 56*150?

There will be weekly snapshots, for 1 year - 52 weeks. If you stake, you get 50% more tokens than if you do not stake. The first weeks, you get 5 x more MEX than on a normal week, 4, 3, 2, until just 1x

100×1.5×some other parameter that we dont know yet

We don't know the exact distribution yet

I think theres 52 weeks

Let's wait for an official calculator for the rewards, right now the numbers are complex.