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a: \(\Leftrightarrow\left[\left(3x+14\right):4-3\right]:2=1\)
=>(3x+14):4-3=2
=>(3x+14):4=5
=>3x+14=20
=>3x=6
hay x=2
b: \(\Leftrightarrow\left[\left(x:4+17\right):10+3\cdot16\right]:10=5\)
\(\Leftrightarrow\left(x:4+17\right):10=50-48=2\)
=>x:4+17=20
=>x:4=3
hay x=12
c: \(\Leftrightarrow2\cdot15^2+\left[2\cdot125-\left(2x+4\right)\cdot5\right]:19=453\)
\(\Leftrightarrow250-\left(2x+4\right)\cdot5=\left(453-450\right)\cdot19=57\)
=>5(2x+4)=197
=>2x+4=197/5
=>2x=177/5
hay x=177/10
d: \(\Leftrightarrow\left(19x+50\right):14=5^2-4^2=9\)
=>19x+50=126
=>19x=76
hay x=4
e: \(\Leftrightarrow2\cdot3^x=10\cdot3^{12}+8\cdot3^{12}=18\cdot3^{12}\)
\(\Leftrightarrow3^x=3^2\cdot3^{12}=3^{14}\)
hay x=14
f: \(\Leftrightarrow3\left(x+2\right):7=30\)
=>3(x+2)=210
=>x+2=70
hay x=68
g: \(2480-1570+200-x+5=1010\)
=>1115-x=1010
hay x=105
A = 23 . 19 - 23 . 14 + 12018
= 23.(19 - 14) + 1
= 8 . 5 + 1
= 40 + 1 = 41
B = 102 - [60 : (56 : 54 - 3. 5)]
= 100 - [60 : (10 - 15)]
= 100 - [60 : (-5)]
= 100 + 12
= 112
CÁC BẠN GIÚP MÌNH VỚI ! CẢM ƠN CÁC BẠN RẤT NHIỀU !!!
\(5^2\cdot6:\left[2016^0\cdot\left(128-5^3\right)\right]\)
\(=25\cdot6:\left[1\cdot\left(128-125\right)\right]\)
\(=25\cdot6:\left[1\cdot3\right]\)
\(=25\cdot6:3\)
\(=150:3\)
\(=50\)
\(\left(2^{2018}:2^{2012}-6^2\right)-\left[\left(35-22\right)^2-6^2\right]\)
\(=\left(2^6-6^2\right)-\left[13^2-6^2\right]\)
\(=\left(64-36\right)-\left[169-36\right]\)
\(=28-133\)
\(=-105\)
mời bạn đừng thi thì tốt hơn 
b1
75.73-[15:(42-11)]+53:52
=75+3-[15:(16-11)]+53-2
=78-15:5+5
=5764801-3+5
=5764803
a) \(44:22+58.6-2\)
\(=2+348-2\)
\(=348\)
b) \(6^2:4,3+2.5^2-2018^0\)
= \(36:4,3+2.25-1\)
\(\approx8,4+50-1\)
\(\approx57,4\)
c) \(\left|-12\right|+\left[-14+2^5:3^3\right]\)
= \(12+\left[-14+32:27\right]\)
\(\approx12+\left[-14+1,2\right]\)
\(\approx12-13,2\)
\(\approx-1,2\)