\(a,100+\left(+430\right)+2145+\left(-530\right)\)
\(=100+430+2145-530\)
\(=\left(100+2145\right)+\left(430-530\right)\)
\(=2245+\left(-100\right)\)
\(=2245-100\)
\(=2145\)
\(b,,\left(-12\right).15\)
\(=-180\)
\(c,\left(+12\right).13+13.\left(-22\right)\)
\(=13.\left[12-22\right]\)
\(=13.\left(-10\right)\)
\(=-130\)
\(d.\left\{\left[14:\left(-2\right)\right]+7\right\}:2012\)
\(=\left\{-7+7\right\}:2012\)
\(=0:2012\)
\(=0\)
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