Solve -1-30-(10-20)(-15-(10-15))

$$- 1 - 30 - ( 10 - 20 ) ( - 15 - ( 10 - 15 ) )$$

Evaluate

$$-131$$

Solution Steps

Subtract 30 from -1 to get -31.

$$-31-\left(10-20\right)\left(-15-\left(10-15\right)\right)$$

Subtract 20 from 10 to get -10.

$$-31-\left(-10\left(-15-\left(10-15\right)\right)\right)$$

Subtract 15 from 10 to get -5.

$$-31-\left(-10\left(-15-\left(-5\right)\right)\right)$$

The opposite of -5 is 5.

$$-31-\left(-10\left(-15+5\right)\right)$$

Add -15 and 5 to get -10.

$$-31-\left(-10\left(-10\right)\right)$$

Multiply -10 and -10 to get 100.

$$-31-100$$

Subtract 100 from -31 to get -131.

$$-131$$

Factor

$$-131$$