\(a.2^3-5^3:5^2+12\cdot2^2\\ =8-5+12\cdot4\\ =3+48\\ =51\\ c.2\left[\left(7-3^3:3^2\right):2^2+99\right]-100\\ =2\left[\left(7-3\right):4+99\right]-100\\ =2\left(4:4+99\right)-100\\ =2\cdot100-100\\ =200-100\\ =100\\ e.\left(3^5\cdot3^7\right):3^{10}+5\cdot2^4-7^3:7\\ =3^{12}:3^{10}+5\cdot16-7^2\\ =3^2+80-49\\ =9+80-49\\ =40\\ g.\left(6^{2007}-6^{2006}\right):6^{2006}\\ =6^{2007}:6^{2006}-6^{2006}:6^{2006}\\ =6-1\\ =5\\ i.\left(7^{2005}+7^{2004}\right):7^{2004}\\ =7^{2005}:7^{2004}+7^{2004}:7^{2004}\\ =7+1\\ =8\\j. \left(7^5+7^9\right)\left(5^4+5^6\right)\cdot\left(3^3\cdot3-9^2\right)\\ =\left(7^5+7^9\right)\left(5^4+5^6\right)\cdot\left(3^4-9^2\right)\\ =\left(7^5+7^9\right)\left(5^4+5^6\right)\cdot\left(81-81\right)\\ =\left(7^5+7^9\right)\left(5^4+5^6\right)\cdot0\\ =0\)
