Evaluate :

`a times b times c times ( -d ) times (-e ) times (-f )`

Evaluate : b times b times b times b

Evaluate : x^a times x^b times x^c times x^(-d )

Evaluate : ( b times c ) times ( c times a )

Evaluate : a times b times a times b times c times c times c

Evaluate : ( b times c ) times ( c times a ) =

Evaluate : c times c times c times c times c

Evaluate : [ ( a times b ) times ( b times c ) ( b times c ) times ( c times a ) ( c times a ) times ( a times b ) ]

Evaluate : a^7 times b^7 times c^(-4 ) times c^(5 ) times d^( 9 )

Evaluate : ( c )   x times x times x times x times a times a times b times b times b ( d ) ( -2 ) times ( -2 ) times ( -2 ) times ( -2 ) times a times a times a

Evaluate : a times a times a times b times b times c times c times c times c