6 +24 :3 x 0.5(4)to the second power

=6+8 x 0.5 x 16
8+0.5 x16=6+ 4 x4x4=64=6+64x = x=70

is this right

ok to here, if : means ÷

=6+8 x 0.5 x 16
not sure what the rest is, but
= 6 + 4 x 16
= 6 + 64
= 70
you seem to have arrived at the correct answer.

Online, we write 4^2 for 4 to the second power