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InTegraL

∫x^n dx = 1/(n+1) . x^(n+1) + C

•
∫(x² - 2x + 4) dx
= x³/3 - 2x²/2 + 4x + C
= 1/3 x³ - x² + 4x + C

••
∫(-2x² + 4x + 1) dx
= -2/3 x³ + 2x² + x + C

•••
∫(-2x³ + 15) dx
= -2/4 x⁴ + 15x + C
= -1/2 x⁴ + 15x + C