Tricky find(living without the -Operatorbegin tag)

I would like to do the following find but it looks like Lasso 7 does not allow the use of the OperatorBegin/End tag when using FMP its proving tricky. Anybody have any suggestions?

[inline: -Search,

-Database='ChannelLines.fp5',

-Layout='Web',

-Keyfield='zk_channelLineID_p',

-OperatorBegin='OR',

-OperatorBegin='AND',

-Operator='gte', 'channelStartDate'=(Action_Param:'channelStartDate'),

-Operator='lte', 'channelStartDate'=(Action_Param:'channelFinishDate'),

-OperatorEnd='AND',

-OperatorBegin='And',

-Operator='gte', 'channelFinishDate'=(Action_Param:'channelStartDate'),

-Operator='lte', 'channelFinishDate'=(Action_Param:'channelFinishDate'),

-OperatorEnd='AND',

-OperatorBegin='AND',

-Operator='gte', 'channelFinishDate'=(Action_Param:'channelFinishDate'),

-Operator='lte', 'channelStartDate'=(Action_Param:'channelStartDate'),

-OperatorEnd='AND',

-OperatorEnd='OR']

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