Use the semantic rules below to draw an annotated parse tree for the expression. Compute the final value. (4*2)+3+(3*3+2)n [...]

9 This question is easy the only catch is in int z = ADD(SQUARE(x++),y); in this line .Firstly it will take the value of 2 as it is and then increment so the value will be 2*3.z=(2*3)+3 = 9. [...]

nth group starts with $(n-1)$$^{2}$ $+$ $1$ and ends with $n$$^{2}$ and every group consists $2n-1$ numbers $15th$ group starts with 196 and ends with $225$ $sum$ = $\frac{No of terms}{2}$ * $[first$ $term$+$last$ $term]$ = $\frac{29}{2} * [(196+1) + 225]$ = $6119$ [...]

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Another Approach: It is given 4th term=8 so consider an AP with 7 terms as following a-3d , a-2d , a-d , a , a+d , a+2d , a+3d Here 4th term = a = 8 Sum of the above series= 7*8=56 Answer= 56 [...]