In the following contruction:
\noindent{\bf 4.6}\,\, Calcule\smallskip
\noindent a) $\Phi(7)$ \hspace{1.8cm} b) $\Phi(5)$ \hspace{1.9cm} c) $\Phi(1+i)$\smallskip
the "a" on the second line is joined to the first line, even though it is separated by a NEWLINE, \smallskip a \noindent.
In the following contruction:
the "a" on the second line is joined to the first line, even though it is separated by a NEWLINE, \smallskip a \noindent.