vector as string: vector(0.3,1.5) -> operand #1
-----
vector stretch (operator, copy): vector(0.6,3.0) -> operand #2
vector control #1: vector(0.3,1.5)
vector squeeze (operator): vector(0.3,1.5)
vector stretch (operator): vector(0.6,3.0)
-----
vector addition (operator, copy): vector(0.9,4.5)
vector control #1: vector(0.3,1.5)
vector control #2: vector(0.6,3.0)
vector subtraction (operator): vector(0.3,1.5)
vector control #2: vector(0.6,3.0)
-----
vector subtraction (operator, copy): vector(-0.3,-1.5)
vector control #1: vector(0.3,1.5)
vector control #2: vector(0.6,3.0)
vector addition (operator): vector(0.3,1.5)
