\frac{134}{\left(1+0,\:12\right)}+\frac{134}{\left(1+0,\:12\right)^2}+\frac{134}{\left(1+0,\:12\right)^3}+\frac{134}{\left(1+0,\:12\right)^4}+\frac{134}{\left(1+0,\:12\right)^5}+\frac{134}{\left(40+2\right)^6}-400=
Mathbot Says...
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.