calculeaza :a) 2^4×5-2^3×3-2^2×12
b)2^15-2^14-2^13-2^12-....-2-1
c)(7^6-7^4):48
d)(2^14+2^14:2^15
am nevoie de ajutor ...va rog!!!!
care puteti sa ma ajutati va rog repedeeeee!!!!