Respuesta :
Here’s my work to your question. Make note of the principle PEMDAS. Do it in order and make sure you solve future problems, left to right. If you have any concerns drop a comment below!
P - parenthesis
E - exponents
M - multiplication
D - division
A - addition
S- subtraction
P - parenthesis
E - exponents
M - multiplication
D - division
A - addition
S- subtraction

Step-by-step explanation:
75-7=68 +(12)+1 exponent 3 meaning one multiplying itself three times so
68+12+1×1×1
80+1×1
80+1
=81