code: public static BigComplex pow(BigComplex x, BigDecimal y, MathContext mathContext) {
  		MathContext mc = new MathContext(mathContext.getPrecision() + 4, mathContext.getRoundingMode());
  
  		BigDecimal angleTimesN = x.angle(mc).multiply(y, mc);
  		return BigComplex.valueOf(
  				BigDecimalMath.cos(angleTimesN, mc),
  				BigDecimalMath.sin(angleTimesN, mc)).multiply(BigDecimalMath.pow(x.abs(mc), y, mc), mc).round(mathContext);
  	}
docs: Calculates {@link BigComplex} x to the power of {@link BigDecimal} y (x<sup>y</sup>).
  
  @param x the {@link BigComplex} value to take to the power
  @param y the {@link BigDecimal} value to serve as exponent
  @param mathContext the {@link MathContext} used for the result
  @return the calculated x to the power of y with the precision specified in the <code>mathContext</code>