$\frac{(0.87)^{3}+(0.13)^{3}}{(0.87)^{2}+(0.13)^{2}-(0.87) \times(0.13)}$ is equal to

The value of $1 + 1 + \frac{1}{4 \times 3} + \frac{1}{4 \times 3^{2}} + \frac{1}{4 \times 3^{3}}$ up to four places of decimals is

The value of $\frac{3.6 \times 0.48 \times 2.50}{0.12 \times 0.09 \times 0.5}$ is

$138.009 + 341.981 - 146.305 = 123.6 + ?$

If $m$ and $n$ are whole numbers such that $m^{n}=121$,then $(m-1)^{n+1}=?$

Seema bought $20$ pens,$8$ packets of wax colours,$6$ calculators,and $7$ pencil boxes. The price of a pen is $Rs. 7$,a packet of wax colour is $Rs. 22$,a calculator is $Rs. 175$,and a pencil box is $Rs. 14$ more than the combined price of one pen and one packet of wax colours. How much amount did Seema pay to the shopkeeper? (in $Rs.$)