\(a,\left(-2\right).\left(-7\right).\left(-5\right).\)
\(=\left[\left(-2\right).\left(-5\right)\right].\left(-7\right).\)
\(=10.\left(-7\right)=\left(-70\right).\)
\(b,15-22+\left(-17\right).\)
\(=\left(-7\right)+\left(-17\right)=\left(-24\right).\)
\(c,25.\left(-4\right)-20.\left(-5\right).\)
\(=\left(-100\right)-\left(-100\right)=\left(-100\right)+100=0.\)
\(d,185-\left(49+185\right).\)
\(=185-49-185.\)
\(=\left(185-185\right)-49.\)
\(=0-49=\left(-49\right).\)
\(e,\left(-19\right).\left(-13\right)+13.\left(-29\right).\)
\(=\left(-19\right).\left(-13\right)+\left(-13\right).29.\)
\(=\left[\left(-19\right)+29\right]\left(-13\right).\)
\(=10.\left(-13\right)=\left(-130\right).\)
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