Question

4x3¹⁹⁹⁵-3¹⁹⁹⁶-3x3¹⁹⁹⁴

Answer 1

${3}^{1994} (4 \times 3 - 3 \times 3 - 3)$
${3}^{1994} \times 0$
= 0

Answer 2

= 3^1995 x ( 4 - 3  - 1) = 3^1995 x 0 = 0