pre_text: Stock-Based Compensation Expense Stock-based compensation expense is included in the consolidated statements of operations as follows (in millions): As of April 26, 2019, total unrecognized compensation expense related to our equity awards was $285 million, which is expected to be recognized on a straight-line basis over a weighted-average remaining service period of 2.1 years.
table: Year Ended
table: April 26, 2019 April 27, 2018 April 28, 2017
table: Cost of product revenues $ 4 $ 3 $ 4
table: Cost of hardware maintenance and other services revenues 10 10 13
table: Sales and marketing 67 68 84
table: Research and development 48 49 59
table: General and administrative 29 31 35
table: Total stock-based compensation expense $ 158 $ 161 $ 195
table: Income tax benefit for stock-based compensation $ 15 $ 29 $ 41
question: Analyse this data from a financial earnings document. What would be the change in Research and development expense between 2017 and 2018?