Related Clues:

• Press '+' on a calculator
• What a caret means
• Use the +
• Opposite of drop
• Connect with on social media
• Do some basic math
• Join old man, heading some way back
• Obtain a sum
• "That doesn't ___ up"
• 'It just doesn't ___ up'
• Antonym of ''remove''
• Do simple computations
• Comment further
• Perform an operation
• Include in the mix