вычислить:
а)18*(1/9)²-20*1/9
б)(19/8+11/12):5/48
в)21/0,6*2,8
г)5√11*√2*√22
д)√90*30*3
е)(√23+1)²
ж)0,8*(-7)⁴-0,3*(-7)²+45
даю 35 баллов срочно надо!
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