Hey there!
10 + 5 - 3 * 1 + 3
10 + 5 = 15
= 15 - 3 * 1 + 3
3 * 1 = 3
= 15 - 3 + 3
15 - 3 = 12
= 12 + 3
= 15
OR BETTER STEPS
10 + 5 - 3 * 1 + 3
= 15 - 3 + 3
= 12 + 3
= 15
~~~~~~~~~~~~
Either both of those steps should give you your result
Answer: 15
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)