System bets are a popular type of betting where every possible combination is created from a number of bets. They provide higher odds like accumulator bets, but won't lead to a total loss if one bet goes wrong. For system bets with many bets, it may be difficult to calculate the expected return when one or more picks turn out to be wrong.
For this problem, betbuzz.net provides a handy calculator to quickly determine your possible winnings. Thanks to the options "won/void" and "loss/void" you can also easily calculate the return of system bets that contain asian handicaps.
This chart shows the potential return had you placed the same bets in a different system, as singles or in a parlay/accumulator.