Find the sum given below:

$\left(-5\right)+\left(-8\right)+\left(-11\right)+ ... +\left(-230\right)$

In an AP (with usual notations):

given $a=5, d=3, a_n=50$, find $n$ and $S_n$.

In an AP (with usual notations):

given $a=7, a_{13}=35$, find $d$ and $S_{13}$.

In an AP (with usual notations):

given $d=5, S_9=75$, find $a$ and $a_9$.

In an AP (with usual notations):

given $a=8, a_n=62, S_n=210$, find $n$ and $d$.

In an AP (with usual notations):

given $a=3, n=8, S_n=192$, find $d$.