2(8-3х)+1=4+9х
16-6х+1=4+9
-6х-9х=4-1-16
-15х=-13
х=13/15
1)(7m⁴)³+(4n⁴)³=343m¹²+64n¹²
2)(3m⁵)³-n¹⁵=27m¹⁵-n¹⁵
3)(4c⁴+3d³)³=64c¹²+144c⁸d³+108c⁴d⁶
4)(2c³-9d⁸)³=81c⁹-108c⁶d⁸+486c³d¹⁶-729d²⁴
5)(600³+2³)=(602)(360000+4-1200)=602*362404=218167208
6)(800³-2³)=798*(640000+4+1600)=508169592
7)(n⁵+4m²)³