Mathematics 
To dream about mathematics suggests that you are attempting to assess an issue and discover the best way to resolve it. You should use practical and sensible reasoning rather than your instincts and feelings.
To dream that you are unable to solve a mathematical problem or equation is a reflection of an issue that you are unsure about. This dream may be leading you towards a resolution.
Necromancer
To dream of a necromancer symbolizes the wicked perils that may possibly be performed by your queer contact.
*See Hypnotist.
Nightingale
To dream of a singing nightingale denotes an attractive and wholesome environment. To dream of a silent nightingale means a spat among friends most likely due to miscommunication.
Ouija Board
To dream of an Ouija board bodes of failure in a relationship or state of affairs. It may also indicate successive disappointment in what you have planned.
Dreaming of a non-functioning Ouija board embodies difficulties caused by prioritizing pleasures over work and goals.
Outer Space
To dream of outer space suggests the sudden appearance of something or someone out of nowhere.
Pocketknife
To dream of a pocketknife hints of a friend who is reticent to show his true feelings for you.
Power Lines
To dream of seeing or being entangled in power lines portrays your strive to gain power. There is a hindrance either in your relationship or profession.
Rattlesnake
To dream of a rattlesnake symbolizes your life journey and the passage of time.
Rubber Band
To dream of a rubber band denotes a need to be more flexible in your dealing with others. You need to stretch the way you react, imagine, or conceptualize plans.
To see a rubber band snap signifies that you are overburdened. You have overstretched yourself.
Screwdriver
To dream of a screwdriver signifies your desire to repair a damaged situation or relationship. It may also represent a person in your life who needs your help to deal with certain issues.