$ tr bc
  Calculator.

  Run calculator in interactive mode using the standard math library:

      bc -l

  Calculate the result of an expression:

      bc <<< "(1 + 2) * 2 ^ 2"

  Calculate expression and force number of decimal places to 10:

      bc <<< "scale=10; 5 / 3"

  Calculate expression with sine and cosine using mathlib:

      bc -l <<< "s(1) + c(1)"

$ sudo vi /usr/bin/cheat
#!/bin/sh

curl cheat.sh/$1

$ sudo chmod +x /usr/bin/cheat

$ cheat bc
# bc
# Calculator.

# Run calculator in interactive mode using the standard math library:
bc -l

# Calculate the result of an expression:
bc <<< "(1 + 2) * 2 ^ 2"

# Calculate expression and force number of decimal places to 10:
bc <<< "scale=10; 5 / 3"

# Calculate expression with sine and cosine using mathlib:
bc -l <<< "s(1) + c(1)"