If
=IF(test, then, else)
=IF(EQ(A1, "paid"), "true", "false")
Comparators
=EQ(a,b) NE()
=GT() GTE() LT() LTE()
Math
=POW(2, 32) # 2^32
=SIN() ACOS() etc
=CEILING(n,sig,mode)
=FLOOR(n,sig,mode)
=INT(n)
=SUM(range)
=SUMIF(range, criteria, sum_range)
=SUMIF(A1:A5, ">300", B1:B5) # if A# is >300, use B#
Core
=TO_DATE(number)
Vlook
=VLOOKUP(value, range, column_index)