Tính giá trị biểu thức sau a)$A=123\left(123+154\right)+77^2$ b)$B=\frac{135^2+130.135+65^2}{135^2-65^2}$ c)C=$1^2-2^2+3^2-4^2+.\ldots-2018^2+2019^2$ d)D=...

a) $A=123\left(123+154\right)+77^2$ $=123.277+77^2$ $=34431+5929$ $=40360$. b) $B=\frac{135^2+130.135+65^2}{135^2-65^2}$ $=\frac{\left(135+65\right)^2}{135^2-65^2}$ $=\frac{200^2}{200.70}$ $=\frac{200}{70}$ $=\frac{100}{35}$ $=\frac{20}{7}$. c) $C=1^2-2^2+3^2-4^2+.\ldots-2018^2+2019^2$ $=\left(1-2\right)\left(1+2\right)+\left(3-4\right)\left(3+4\right)+\ldots+\left(2019-2018\right)\left(2019+2018\right)$ $=-1.3-1.7-1.11-\ldots-1.4035+1.4037$ $=-3-7-11-\ldots-4035+4037$ $=-4037+4037=0$. d) $D=\left(2+1\right)\left(2^{^2}+1\right)\left(2^4+1\right)\left(2^8+1\right)\left(2^{16}+1\right)\left(2^{32}+1\right)-2^{64}$ $=3.5.17.257.65537.4294967297-2^{64}$ $=2^{64}+1-2^{64}=1$.