from sympy import symbols, Limit, S, pprint

t = symbols( 't' )
pT = .37 +  .21*t
lim = Limit( pT, t, S.Infinity )

pprint( lim.doit() )

x = symbols('x')
fx = .37 + .21*x
fx.subs( { x: 2.99999} )

.37 + .21 + .21
e621614f8b15b953d82d145f4fbe915a95d8164b
<mask token>

<mask token>
pprint(lim.doit())
<mask token>
fx.subs({x: 2.99999})
0.37 + 0.21 + 0.21

<mask token>
t = symbols('t')
pT = 0.37 + 0.21 * t
lim = Limit(pT, t, S.Infinity)
pprint(lim.doit())
x = symbols('x')
fx = 0.37 + 0.21 * x
fx.subs({x: 2.99999})
0.37 + 0.21 + 0.21

from sympy import symbols, Limit, S, pprint
t = symbols('t')
pT = 0.37 + 0.21 * t
lim = Limit(pT, t, S.Infinity)
pprint(lim.doit())
x = symbols('x')
fx = 0.37 + 0.21 * x
fx.subs({x: 2.99999})
0.37 + 0.21 + 0.21

from sympy import symbols, Limit, S, pprint

t = symbols( 't' )
pT = .37 +  .21*t
lim = Limit( pT, t, S.Infinity )

pprint( lim.doit() )

x = symbols('x')
fx = .37 + .21*x
fx.subs( { x: 2.99999} )

.37 + .21 + .21