\(\left(-37\right)+65+\left(-12\right)+\left(-1\right)\)
\(=-37+65-12-1\)
\(=-\left(37-65\right)-12-1\)
\(=-\left(-28\right)-12-1\)
\(=28-12-1\)
\(=16-1\)
\(=15\)
= (-37) + 65 - 12-1
= -( 37-65) - 12-1
= - (- 28 )-12 -1
= 28 -`12-1
= 16 - 1
=15
\(\left(-37\right)+65+\)\(\left(-12\right)+\left(-1\right)\)
=\(\left[\left(-37\right)+\left(-12\right)+\left(-1\right)\right]+65\)
=\(-\left(37+12+1\right)+65\)
=\(\left(-50\right)+65\)
=15