Identify the numerical coefficients of terms (other than constants) in the following expression:

$1+t+t^2+t^3$

Identify the numerical coefficients of terms (other than constants) in the following expression:

$x+2xy+3y$

Identify the numerical coefficients of terms (other than constants) in the following expression:

$100m+1000n$

Identify the numerical coefficients of terms (other than constants) in the following expression:

$-p^2{q}^2+7pq$

Identify the numerical coefficients of terms (other than constants) in the following expressions:

$1.2a+0.8b$

Identify the numerical coefficients of terms (other than constants) in the following expression:

$2(l+b)$

Identify the numerical coefficients of terms (other than constants) in the following expression:

$0.1y+0.01y^2$

Identify terms which contain $x$ and give the coefficient of $x$.

$y^{2}x+y$