10²-3²=(10-3)(10+3)=7*13=91
(10-3)²=(10-3)(10-3)=7*7=49
-5² -(-1)^6=-25 - 1= -26
-7³+(-2)³= -7³ - 2³= -(7³+2³)= -(7+2)(49-14+4)= - (9*39)= - 351
0,2*3² - 0,3*2^4=0.2*9 - 0.3*16=1.8 - 4.8= - 3
8*0.5³ +25*0.2²=2³ *0.5³+5² *0.2²=0.2³ *10³ *0.5³ +0.5² *10² *0.2²=0.2² *10² *0.5²(0.2*10*0.5+1)=4*0.25*(1+1)=1*2=2