exam Maths Puzzle Numerical Ability

hi can u help me with this problem...

[1 1/2 4 5 [-2 -4 7/8 11/2

2 3/5 8 9] + 3 2 -1 -10/11]

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exam Other Question

Kathy borrowed some money. . She repaid the loan plus 10.5% of the original amount for interest. She paid back a total of $8287.50.How much money did she borrowed originally. what is 4/11 * 7?
i dont know what do to here, and i have no clue how to muliply it.