Arslan-TR

//Usage:    
       linear(t, tMin, tMax, value1, value2)



//example 1 #invert value referance to a source:	

       source= thisComp.layer("Layer 1").transform.opacity;   //link a slider/value for source;
       linear(source,0,100,100,0)

Arslan-TR

// wiggle expression (usage & combinations) After effects 
// usage:
// wiggle(freq, amp, octaves = 1, amp_mult = .5, t = time)
//example 1 single value example:
      wiggle(0.4,19,3)  

//example for 2 seperate dimension example:
      [wiggle(5,30)[0],wiggle(1,100)[1]]  
      
//example values for natural movement 2 seperate dimension example: