please solve it step by step
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a).35+66/154+[(-56)+(-126)/147]
101/154+[-56-126/147]
=101/154+(-182/147)
=101/153-182/147
=14847-27846/22491
=-12999/22491
b). -14/3×1/5×-1/7×15/4
=-2/3×1/5×-1/1×15/4
=-1/3×1/1×-1/1×3/2
=-1/1×1/1×-1/1×1/2
=1/2
hope it helps
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