Formule che incasinano mathjax:
`G(s)={K(s-z_1)(s-z_2)…(s-z_(m'))}/{s^(g)(s-p_1)(s-p_2)…(s-p_(n'))}`
`G(s)=mu{(1+s tau_(z_(i)))(1+s tau_(z_(2)))…(1+s tau_(z_(m')))}/{s^(g)(1+s tau_(p_(i)))(1+s tau_(p_(2)))…(1+s tau_(p_(n')))}`