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diff --git a/lang/mips/chapter-2/exercise-1/a.s b/lang/mips/chapter-2/exercise-1/a.s
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+# t3 = t4 + t5 - t6
+	.text
+main:
+	li	$t4,	4		# t4 = 4
+	li	$t5,	5		# t5 = 5
+	li	$t6,	6		# t6 = 6
+
+	add	$t3,	$t4,	$t5	# t3 = t4 + t5
+	sub	$t3,	$t3,	$t6	# t3 -= t6
+
+	li	$v0,	1		# print integer
+	move	$a0,	$t3		# at t3
+	syscall
+
+	li	$v0,	11		# print character
+	li	$a0,	10		# newline
+	syscall
+
+	li	$v0,	10		# terminate program run
+	syscall