a: \(58\cdot75+58\cdot50-58\cdot25\)
\(=58\cdot\left(75+50-25\right)\)
\(=58\cdot100=5800\)
c: \(20:2^2-5^9:5^8\)
=20:4-5
=5-5=0
e: \(295-\left(31-2^2\cdot5\right)^2\)
\(=295-\left(31-20\right)^2\)
\(=295-11^2=295-121=174\)
h: \(47-\left(45\cdot2^4-5^2\cdot12\right):14\)
\(=47-\left(45\cdot16-300\right):14\)
=47-420:14
=47-30
=17
b: 497+98+(-397)+(-198)
=(497-397)+(98-198)
=100-100
=0
d: \(\left(5^{19}:5^{17}-4\right):7\)
\(=\left(5^2-4\right):7\)
=(25-4):7
=21:7
=3
f: \(11^{25}:11^{23}-3^5:\left(1^{10}+2^3\right)-60\)
\(=11^2-3^5:9-60\)
=121-27-60
=121-87
=34
j: \(2345-1000:\left\lbrack19-2\cdot\left(21-18\right)^2\right\rbrack\)
\(=2345-1000:\left\lbrack19-2\cdot3^2\right\rbrack\)
=2345-1000
=1345
