In Q1'26, GOOG's total operating expenses reached $28.93B USD, comprising $17.03B USD in R&D expenses and $11.90B USD in SG&A expenses, marking a slight decline from the peak of $32.13B USD in Q4'25. From Q2'23 to Q1'26, R&D expenses exhibited steady growth from $10.59B USD to $17.03B USD, with a notable acceleration in Q4'25 to $18.57B USD before a 8.3% drop in the latest quarter, while SG&A expenses fluctuated between $9.45B USD and $14.60B USD, showing volatility but stabilizing around $12B USD recently; overall, the stacked bar chart reveals a rising trend in total operating expenses, driven primarily by R&D investments, with a 70% increase over the period amid periodic dips in SG&A.