What is the arugument of the complex number `((1+i) (2+i))/(3-i) ` where `=sqrt(-1)` ?

What is the argument of the complex number (-1-i) where i=sqrt(-1)?

Find the modulus of the complex number ((1+i)(2+i))/(3+i)

Find the argument and the principal value of the argument of the complex number z=(2+i)/(4i+(1+i)^(2)) where i=sqrt(-1)

Polar form of the complex number (sqrt(3)+i)/(1-i) is

What is the modulus of the complex number i^(2n+1) (-i)^(2n-1) , where n in N and i=sqrt(-1) ?