import sympy as sm


sm.init_printing()

a, b, th, gama, x, t, y, z = sm.symbols("a, b, theta, gamma, x, t, y, z")
# # sm.pprint(a, b, th, gama, x, t, y, z)

f = sm.Function('f')

# print(sm.latex(f(t)))

expr3 = sm.sin(f(t)) - sm.tan(a/b)/sm.log(gama)

sm.pprint(expr3)

part1 = sm.diff(expr3, a)
part2 = sm.diff(part1, b)

sm.pprint(part2)
print(sm.latex(part2))