a

b

d

c

1+ k

0 + x

x + k

x

 $\frac{1}{2}\ln\left|2x\right|+k$  

 $2\ln\left|2x\right|+k$  

 $\frac{1}{2}\ln\left|x\right|+k$  

 $2\ln\left|x\right|+k$  

 $\frac{2\cdot\left(2x+3\right)^4}{4}+k$  

 $\frac{\left(2x+3\right)^{-4}}{-4}+k$  

 $\frac{\left(2x+3\right)^4}{4}+k$  

 $\frac{1}{2}\frac{\left(2x+3\right)^4}{4}+k$  

1/(n+1) xⁿ⁺¹ + c

nxⁿ⁺¹ + c

1/(n+1) x^n-1 + c

nx^n-1 + c

ln | x | + c

-1 / x² + c

log | x | + c

1 / x² + c

 $\frac{\left(x^2+4\right)^4}{2}+C$  

 $\frac{\left(x^2+4\right)^4}{4}+C$  

 $2x\left(x^2+4\right)^4+C$  

 $\frac{\left(x^2+4\right)^4}{2x}+C$  

46

47

48

49