计算—101乘以998+101^2+99^2
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解:101乘以998+101^2+99^2
=(101^2+2乘101乘99+99^2)+101乘以998-2乘101乘99
=(101+99)^2+101乘(998-2乘99)
=200^2+101乘800
=40000+80800
=120800