4a^4 -2b^2 +40 a=2 b=7 4(2)^4 -2(7)^2 +40 PEMDAS is what your gonna use to solve this you go from right to left
First is P which is parentheses which is none second is E which stands for exponents 4(32)-2(49)+40 now MD multiply or divide 128-98+40 now add or subtract 30+40 last one 70 this is your answer i hope