Х+(25+33)=71
х+58=71
х=71-58
х=13
13+(25+33)=71
13+58=71
71=71
(74+18)-х=37
92-х=37
х=92-37
х=55
(74+18)-55=37
37=37
8а^6-27=(2а²-3)(4а⁴+6а²+9)
а³+64=(а+4)(а²-4а+16)
(3х-4)³=27х³-108х²+144х-64
(5х+у)³=125х³+75х²у+15ху²+у³
=20 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!