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-56
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-56
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\frac{10}{10}-3\left(15-10\right)^{2}+5\times 3-\left(6-2\right)+7
Add 8 and 2 to get 10.
1-3\left(15-10\right)^{2}+5\times 3-\left(6-2\right)+7
Divide 10 by 10 to get 1.
1-3\times 5^{2}+5\times 3-\left(6-2\right)+7
Subtract 10 from 15 to get 5.
1-3\times 25+5\times 3-\left(6-2\right)+7
Calculate 5 to the power of 2 and get 25.
1-75+5\times 3-\left(6-2\right)+7
Multiply 3 and 25 to get 75.
-74+5\times 3-\left(6-2\right)+7
Subtract 75 from 1 to get -74.
-74+15-\left(6-2\right)+7
Multiply 5 and 3 to get 15.
-59-\left(6-2\right)+7
Add -74 and 15 to get -59.
-59-4+7
Subtract 2 from 6 to get 4.
-63+7
Subtract 4 from -59 to get -63.
-56
Add -63 and 7 to get -56.
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