Bonsoir,
[tex]A=(-5)^{2}+2*5^{2} =25+2*25=25+50=75\\B=2*3^{3} +3-4^{2}*3-(-2)^{3}=2*27+3-16*3-(-8)=54+3-48+8=57-40=17\\\\C=\frac{2^{3} }{3^{2} } : \frac{2^{4} }{3}=\frac{8}{9} :\frac{16}{3} =\frac{8}{9} *\frac{3}{16} =\frac{8*3}{9*16} =\frac{24}{144}=\frac{1}{6}[/tex]