nl_tokens: integral ( x^c x ) = 1 / ( c + 1 ) * x^ ( c + 1 ) and integral ( x^ ( - 1 )) = log ( x )
pl_tokens: function ( expr , context ) { if ( expr . type === "OperatorNode" && expr . op === '^' && expr . args [ 0 ] . equals ( context . variable ) && context . isConstant ( expr . args [ 1 ] ) ) { // Simplify Exponent if constant var exponentValue = getNumericValue ( expr . args [ 1 ] ) ; if ( exponentValue === - 1 ) { return new FunctionNode ( 'log' , [ new FunctionNode ( 'abs' , [ context . variable . <mask> ( ) ] ) ] ) ; } else { return new OperatorNode ( '*' , 'multiply' , [ new OperatorNode ( '/' , 'divide' , [ new ConstantNode ( 1 ) , new OperatorNode ( '+' , 'add' , [ expr . args [ 1 ] . clone ( ) , new ConstantNode ( 1 ) ] ) ] ) , new OperatorNode ( '^' , 'pow' , [ expr . args [ 0 ] . clone ( ) , new OperatorNode ( '+' , 'add' , [ expr . args [ 1 ] . clone ( ) , new ConstantNode ( 1 ) ] ) ] ) ] ) ; } } }