помогите пожалуйста. найдите значения выражения.
1)a^2 - 1 \3b^2 *15 b^3 \ a +1 при a= -2 , b=0,2
2)7a+7b\5c^2 * 14c \6b + 6a при с =3,5
3) x^2 -2x \a^2 + a : 8x - 16 \3^a+3 при а =5, x=-3
4) b - 5 \4 -4^c : b^2 -25 \ c - c^2 при b =2 ,c=-35
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